This is a list of all the questions and their associated study carrel identifiers. One can learn a lot of the "aboutness" of a text simply by reading the questions.
identifier | question |
---|---|
22620 | the production of a body of strongly''reducing''properties by the action of an oxidising agent upon the inert cellulose molecule(? |
37682 | If no man ever thought himself to be avaricious, or cruel, can it be expected that any person should ever discover that he is too self- conceited? |
29734 | May not plants also restore air diminished by putrefaction by absorbing part of the phlogiston with which it is loaded? |
29734 | May not this phlogistic matter be even the most essential part of the food and support of both vegetable and animal bodies? |
29734 | May not water impregnated with phlogiston from calcined metals, or by any other method, be of some use in medicine? |
29734 | May we not presume that the same remedy would be equally useful in the DYSENTERY? |
29734 | Might it not however give additional efficacy to this remedy, if instead of simple water, the infusion of malt were to be employed? |
30775 | In what ratio does the mercury in the barometer descend in proportion to its elevation? |
30775 | Ought we then to conclude that the oils are the radicals of the vegetable and animal acids? |
30775 | or, what is the same thing, according to what law or ratio do the several strata of the atmosphere decrease in density? |
15576 | PbCl+ 3[.Pb]^{3}[... V]? |
15576 | a. Labradorite([.Ca][.Na][.K])[... Si]+([... Al=][... Fe=])[... Si] Lepidolite( KNaL)F+([... Al=][... Fe=])[... Si]^{2}? |
15576 | b. Gadolinite([.Y][.Ce][.La][.Fe][.Ca])^{3}[... Si] to V. Nephrite([.Ca][.Mg][.Fe])^{4}[... Si]^{3}? |
15576 | or'',''above element symbol[?.Symbol] or[?, Symbol]''-''above element symbol[= Symbol]''-''through element symbol[ Symbol=]... |
15576 | or'',''above element symbol[?.Symbol] or[?, Symbol]''-''above element symbol[= Symbol]''-''through element symbol[ Symbol=]... |
34457 | 0.293| 25Â ° 2Hg_{2}O.N_{2}O_{5}(?) |
34457 | Is it valid, for example, in the case of solutions? |
34457 | It is, therefore, not unnatural to ask the question, Does it hold good for all liquids? |
34457 | What is the interpretation to be put on these curves? |
34457 | What, then, are the components? |
34457 | | 0.110| 25Â ° 3Hg_{2}O.N_{2}O_{5}.2H_{2}O(?) |
46143 | And wherein does this mighty discovery consist? |
46143 | To what then can this difference be owing? |
46143 | c. c._ hastened the corruption of bile: might not this depend on some variety in the composition of that powder? |
20751 | And of Rush he asks-- Pray is he( Webster) a believer in revelation or not? |
20751 | Could it be that, in some way, he may have offended his parent? |
20751 | Here, groves and streams, delights of rural ease; Yet, where the associates, wo nt to serve and please; The aspect bland, that bade the heart confide? |
20751 | Is it worth while to learn the character of this work? |
20751 | Is not this a refreshing confession from the celebrated discoverer of oxygen? |
20751 | To him Priestley had confided his hope of getting a college in Northumberland and inquired,-- Would the State give any encouragement to it? |
20751 | Was not the British escutcheon of science dimmed when Priestley passed into exile? |
20751 | What was it? |
20751 | What would Priestley say could he now pass up and down the famous avenues of our greatest City? |
20751 | Why did he not rely more upon his balance? |
20751 | contributes so much as ours do to the cummunication{ communication} of useful knowledge sense of security which scientificial{ scientific?} |
26243 | Does the air in this case undergo any alteration? |
26243 | If all this is accurate, another question then arises: Why do not blood and the lungs likewise convert fire- air into such an aerial acid? |
26243 | In this case also I obtained our fire- air.... Whence comes the boiling of nitre, fused in a crucible and obscurely red- hot? |
26243 | In this case there now arises in the first place the question: Are the vapours of the acid of nitre naturally red? |
26243 | It is also to be observed that fire- air, vitiated by the lungs, extinguishes fire; why does not the aerial acid attract the phlogiston again? |
26243 | Must it not follow from this that the fire- air is heavier than our air? |
26243 | What more is necessary for its ignition? |
26243 | When this has gone over, the colourless acid follows; but why does the acid make its appearance again so blood- red at the end of the distillation? |
26243 | Where does it now obtain its phlogiston? |
26243 | Who does not see the necessity of making experiments in this case, in order to obtain light concerning this secret of nature? |
26243 | Why has not this redness already been driven over at the beginning? |
26243 | why not also the vitiated air? |
26340 | And you Physicians, Whither is your Opinion flown, to fetch somewhat afar off over the Seas for to cure the_ Dropsie_, and all_ Lunary_ Distempers? |
26340 | And you conceited Naturalists, where is your Writings and Advice of Reason? |
26340 | But how comes it to pass, that a thing which hath a sweet Air, is bitter in Taste? |
26340 | How shall we now do? |
26340 | I open many Mysteries, which ought not to be; but what should I do? |
26340 | O thou valid substance of Metals, how great is thy power, how uninventive is thy virtue, how durable is thy constancy? |
26340 | They say it is a black thing: What think you, is it not black? |
26340 | They say, it is a dry water, if Gold or_ Luna_ be to be refined upon the test, must it not be done with_ Saturn_? |
26340 | They say, our Stone is made of a stinking menstruous thing: What think you, is not_ Saturn_ digg''d out of a stinking Earth? |
26340 | What is the reason of this? |
26340 | What say you, my Child, is not this the true_ Aurum potabile_, and the true Quintessence, and the thing which we seek? |
26340 | You will say, that this my speech is too dark for you; is it so? |
26340 | where is your voice in this case to explain this Mystery? |
46998 | Are they owing to its quality of Lime? |
46998 | But may we not suppose it to have another origin? |
46998 | But to what must we attribute these effects produced by Lime, so different from those produced by Fixed Alkalis? |
46998 | But what Oil? |
46998 | Can it be a substance of the same nature with Æther, a kind of solid Æther, an Æther in a concrete form? |
46998 | Can this arise from hence, that Cream of Tartar, after dissolving a certain quantity of the reguline substance, separates from it afterwards? |
46998 | For how are vegetable substances converted into Chyle and Milk in an animal body? |
46998 | May it not be the Acid of the Spirit of Wine itself, resulting from the decomposition of that mixt in the distillation? |
46998 | May it not be the Marine Acid, but altered by the union it has contracted with the Phlogiston? |
46998 | Now whence can this difference arise? |
46998 | Or is the Cream of Tartar itself decomposed by too long boiling? |
46998 | Or may it not be, with respect to Phosphorus, what the volatile sulphureous spirit is, with respect to Sulphur? |
46998 | What Acid? |
46998 | What is it that is kindled in this case? |
46998 | What must be the consequence, therefore, of mixing these two saline matters together? |
46998 | What then is this singular body? |
46998 | Why doth this Oil take fire? |
46998 | Why then, in this experiment of Mr. Hellot''s, do we obtain only a Spirit of Wine replete with Æther, while none of the other productions appear? |
46998 | and how are they united? |
46998 | or would it produce the same, if it were only a mere Absorbent Earth? |
14641 | And are you your self the Possessor of this Science? |
14641 | But what Man will discover to us this Art in the Metallick Kingdom? |
14641 | For, what can more confirm, and Patronize Verity, than the true Light of Truth it self? |
14641 | He having related these things, I ceased not to enquire of him, to what end he had instanced this? |
14641 | How shall they see the Abyss of the Spagyrick Art? |
14641 | I also enquired of him, whether he( speaking of the Universal Medicine) were not a Physician? |
14641 | I pray Sir, tell me the Truth, whether it be really so, or not? |
14641 | Moreover, when I, affected with admiration said to him; My Master, I pray tell me, where had you this greatest Science of the whole World? |
14641 | My Friend giving the same to him; demanded, whether he would use that Spirit of Salt, he now had, for Metals, or not? |
14641 | Now, what shall I do, my Master? |
14641 | Sir, you say true? |
14641 | So my Master, Is this Sulphureous, and Yellow Glassy Substance the very Philosophick Matter? |
14641 | What mean you by this? |
14641 | What seek you? |
14641 | What? |
14641 | Whether the Potion was Philosophick? |
29757 | And now put this question to yourselves, What produced the friction? |
29757 | Ask yourselves this question-- Why was it that the sulphur took a little time to catch fire? |
29757 | But let us go a step further: why must the solid sulphur be converted into a gas? |
29757 | But what is the light of my candle and gas due to? |
29757 | Do you remember the motto of the Royal Humane Society? |
29757 | How am I to get this spark from the flint and steel to set fire to my tinder? |
29757 | How did our ancestors, think you, obtain fire in those early times? |
29757 | How did they obtain fire? |
29757 | I want you to ask yourselves, Where do the sparks come from? |
29757 | Now why is it that the flame is unable to pass? |
29757 | Well, why is that? |
29757 | Well, you all know what this is? |
29757 | Well, you ask me, is that true of all flame? |
29757 | What am I doing when I apply a lighted match to this candle? |
29757 | What do I want now? |
29757 | What is the brake? |
29757 | What is the object of this blowing operation? |
29757 | Where did the heat come from to melt the ice? |
29757 | Where did the motion go to that I gave the hammer? |
29757 | Where does the heat of the sun come from? |
29757 | Where is the gas, you say, in that candle flame? |
29757 | Why is that ribbon green? |
29757 | Why is this piece of ribbon white? |
29757 | Why is this ribbon red? |
29757 | Why( you say) use sulphur? |
29757 | Why? |
29757 | Why? |
51326 | 148||||||| V.|? |
51326 | But to what does this point? |
51326 | But what would be the result if it were mixed with CCl_{4}? |
51326 | By what are we to be guided in ascribing to some metals univalency and to others bi-, ter-, quadri-,..._ n_-valency? |
51326 | CHAPTER II THE COMPOSITION OF WATER, HYDROGEN The question now arises, Is not_ water_ itself a_ compound substance_? |
51326 | Can not it be broken up into its component parts? |
51326 | Can not it be formed by the mutual combination of some component parts? |
51326 | In what, besides the extra store of energy, which is one of the peculiarities of ozone, resides the cause of its difference from oxygen? |
51326 | It may be asked, what became of the compounds of potassium in the disintegration of the primary rocks, if so small a quantity went to the sea water? |
51326 | Now, how much gas will remain in the liquid and how much will pass over into the surrounding atmosphere? |
51326 | On what are the isomerism of ozone and oxygen, and the peculiarities of ozone, dependent? |
51326 | The question now arises, to what height does the piston rise under these circumstances? |
51326 | These combinations were so expressed formerly-- why has this since been changed? |
51326 | What conclusion, then, can be arrived at? |
51326 | What obliges us to make this difference? |
51326 | What will be the volume of dry gas at 0 ° and 760 mm.? |
51326 | Why are not all metals given the same valency-- for instance, why is not magnesium considered as univalent? |
51326 | that is, in other words, What is the volume occupied by the steam under a known pressure? |
51326 | | Ce 140|? |
51326 | || F 19| Mn 55|? |
4524 | Can the art of agriculture be based upon anything but the restitution of a disturbed equilibrium? |
4524 | Did not the fields of Virginia receive their nitrogen from the same source as wild plants? |
4524 | From what substances, it may be asked, is the blood formed, by means of which of their organs are developed? |
4524 | How does it happen that these substances are indispensable to life? |
4524 | If the metal seeds were once obtained, might they not entertain hopes of their growth? |
4524 | Is it possible that the nitrogen essential to, and entering into, the composition of these crops, could have been drawn from the soil? |
4524 | Should not the fertility, resulting from their application, be altogether independent of the ammonia they contain? |
4524 | This nitrogen is not supplied by man, can it indeed be derived from any other source than the atmosphere? |
4524 | What is the reason one kind of plant succeeds in a field where another fails? |
4524 | What is the reason that a field loses its fertility for one plant, the same which at first flourished there? |
4524 | What nourishment can this draw from a naked rock, upon the surface of which there is no perceptible change? |
4524 | What then is the rationale of the effect of manure,--of the solid and fluid excrements of animals? |
4524 | What, it may be asked, has become of the enormous amount of oxygen thus introduced into the human system in the course of one year? |
4524 | What, then, is the use of the butter and the sugar of milk? |
22914 | And if I know not how Purgation in general is effected in a Humane Body? |
22914 | And, partly, because it seems doubtfull whether the same Ingredients may not be call''d_ Principles_? |
22914 | But further to invalidate his supposition, I shall demand, upon what Chymical Principle Fluidity depends? |
22914 | For what does it teach us, either of the Nature of the Sun, which Astronomers affirme to be eight- score and odd times bigger then the whole Earth? |
22914 | How does this Hypothesis shew us, how much Salt, how much Sulphur, and how much Mercury must be taken to make a Chick or a Pompion? |
22914 | If the whole Body were Eye, where were the Hearing? |
22914 | If you should ask me( continues_ Eleutherius_) what Reasons I mean? |
14218 | What prerogative have vegetables above metals,exclaims one of them,"that God should give seed to the one and withhold it from the other? |
14218 | ''You do not reside in Messina, signor?'' |
14218 | Are electrons normal constituents of all elementary atoms? |
14218 | Are elementary atoms collocations of electrons? |
14218 | Are not metals as much in His sight as trees?" |
14218 | Are not the choicest fables of the poets, That were the fountains and first springs of wisdom, Wrapp''d in perplexed allegories? |
14218 | Are the words I have quoted unintelligible, like the parrot''s prating? |
14218 | But how is such a restoration of phlogiston to be accomplished? |
14218 | Can the atoms of all the elements be caused to give off electrons? |
14218 | How, then, was the transmutation to be accomplished? |
14218 | In his explanation(?) |
14218 | In_ A Catechism of Alchemy_, Paracelsus asks:"What road should the philosopher follow?" |
14218 | Is matter fundamentally homogeneous or heterogeneous? |
14218 | Is this not to perform the miracle of the resurrection? |
14218 | Plato gives him certain directions, and tells him he must use_ magnasia_; the disciple asks--''What is Magnasia, good sire, I yow preye?'' |
14218 | Radio- active substances, are they elements? |
14218 | Rogue, where are my sixty ounces of gold?" |
14218 | Shall reason, founded on false sense, be able to contradict[ the senses], wholly founded as it is on the senses? |
14218 | Sholde it ellis be? |
14218 | Speak not the Scriptures oft in parables? |
14218 | Was not all the knowledge Of the Egyptians writ in mystic symbols? |
14218 | Was not that want the necessity for the realisation of order in the universe? |
14218 | What happens when a substance is burnt in the air? |
14218 | What is the perfection of the common metals? |
14218 | What more simple than to conclude that the iron has been transformed into copper? |
14218 | Why did the alchemists so untiringly pursue their quest? |
14218 | Why does the chemist toil so eagerly? |
14218 | _ Conclusion_.--The lead has vanished; what more natural than the conclusion that it has been transformed into silver? |
14218 | _ See p. 91._] What kind of experimental evidence could an alchemist furnish in support of his theory of transmutation? |
38246 | What''s in a name? |
38246 | *****_ Sub._ And what''s your mercury? |
38246 | But how was this assumption to be proved or disproved? |
38246 | But if this be so, why, he asked, does not water mechanically dissolve the same bulk of every kind of gas? |
38246 | But what, one may ask, is an alkali, of which mention is so often made by Boyle? |
38246 | But why does rapid burning only take place in air? |
38246 | But why is it that certain elementary atoms exhibit affinity for certain others? |
38246 | He seemed, therefore, to have a large experimental basis for his answer to the question,"What happens when a substance burns?" |
38246 | How was this number obtained? |
38246 | Let us shortly review Priestley''s answer to the question,"What happens when a substance burns in air?" |
38246 | Might he not triumphantly assert that he had transmuted lead into silver? |
38246 | Now, could you be at my disposal, say from six in the morning till midnight?''" |
38246 | Or, again, what could any reasonable man make of this? |
38246 | Or, when two compounds are known containing the same pair of elements, why must one be binary and the other ternary? |
38246 | The old difficulty still stares us in the face-- how can we find the number of elementary atoms in the molecule of a given compound? |
38246 | What could this experiment teach save that water was changed into earth and air? |
38246 | What is this but common air completely deprived of phlogiston? |
38246 | What then becomes of this phlogiston? |
38246 | What then, he asks, is this"principle"which can so escape, and be so restored by the action of various substances? |
38246 | Why may it not be ternary or quaternary? |
38246 | Why must the atom of water be built up of one atom of hydrogen combined with one atom of oxygen? |
38246 | Will you act as my cicerone? |
38246 | _ Sub._ And when comes vivification? |
38246 | _ Sub._ How know you him? |
38246 | _ Sub._ What''s cohobation? |
38246 | _ Why_ are acids acid, and_ why_ are alkalis alkaline? |
38246 | and has he not also been taught that every honest effort made to extend the boundaries of natural knowledge must advance that knowledge a little way? |
38246 | and, What can this compound do; how does it react towards other bodies? |
54210 | ( Does it not contain a nitride?) |
54210 | (_ tc_)(_ pc_)_ t__ t__{1}_ s_ N_{2}-146 ° 35-194 ° ·4-214 ° 0·885 CO-139 ° ·5 35·5-190 °-207? |
54210 | ), K_{2}O_{4}, K_{2}O_{2}, CaO_{2}, TiO_{3}, Cr_{2}O_{7}, CuO_{2}(? |
54210 | ), and osmium(? |
54210 | 1·124 NO-93 ° ·5 71·2-153 ° ·6-167 °? |
54210 | A-121 ° 50·6-187 °-189 ° ·6 1·5 O_{2}-118 ° ·8 50·8-182 ° ·7? |
54210 | But an acquaintance with them inevitably leads to the questions, what is the cause of analogy and what is the relation of one group to another? |
54210 | Does not this tend to show that the condition of our globe is very different from that of the rest? |
54210 | For example, the light metals, and copper and silver( especially with the access of air?) |
54210 | H_{3}PO(?) |
54210 | H_{4}CO HClO_{2} H_{2}SO_{2}(?) |
54210 | In Table III., besides the large periods whose maxima correspond with carbon, silicon, titanium, ruthenium(? |
54210 | Is it long since many refused to accept the generalisations involved in the law of Avogadro and Ampère, so widely extended by Gerhardt? |
54210 | Mg Al Si P S Cl K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Rb Sr Y Zr Nb Mo-- Ru Rh Pd Ag Cd In Sn Sb Te I Cs Ba La Ce Di? |
54210 | Molybdenum gives the chlorine compounds, MOCl_{2}, MOCl_{3}(? |
54210 | Of the_ peroxides_ corresponding with hydrogen peroxide, the following are at present known: H_{2}O_{2}, Na_{2}O_{2}, S_{2}O_{7}( as HSO_{4}? |
54210 | Otherwise, how could unity result in a multitude? |
54210 | The data are given in the same manner as in the above- mentioned note: R= Cu Ag Au R+ Cl+33+29+6 R+ Br+25+23 0 R+ I+16+14-6 R+ O+41+ 6-? |
54210 | The question is, what will then occur? |
54210 | The question presents itself as to whether phosphorus in a state of vapour is the ordinary or some other variety? |
54210 | What were the regions touched on by the periodic law? |
54210 | When argon had been isolated the question naturally arose, was it a new homogeneous substance having definite properties or was it a mixture of gases? |
54210 | with the sign(? |
54210 | { CuCl 434 ° ZnCl_{2} 262 ° GaCl_{3} 76 °{( 993 °)( 680 °)( 217 °) AgCl 451 ° CdCl_{2} 541 ° InCl_{3}? |
54210 | |||--|--| 6·1| 23|? |
54210 | |||--|--| 6·6| 21| 700 °?||||||||||--|Ta_{n}H*|10·4| 18|? |
45394 | --To the truth of this latter part of the Doctor''s quotation, will his scholars willingly subscribe? |
45394 | And shall not this night and its long dismal gloom, Like the night of the tempest, again pass away? |
45394 | Are any of the salts of iron present? |
45394 | But, in sober truth, is it possible that any reasonable being can regret the course in which he has been impelled? |
45394 | Can you not, from your extensive stores of philosophy, furnish us with some hints on this subject? |
45394 | Did the agate, after every precaution, still contain some very minute portion of saline matter, not easily discoverable by chemical tests? |
45394 | Has Mr. John Hawkins returned to his native county? |
45394 | Have you yet seen the theory of my colleague, Dr. Young, on the undulations of an Ethereal Medium as the cause of Light? |
45394 | How are such difficulties to be met but by the resources of chemistry? |
45394 | How could it have happened that he overlooked so obvious a source of hydrogen? |
45394 | I remember a chemist having been exposed to much ridicule from speaking of a_ sweet_ acid-- Why not? |
45394 | I used to say to him,''You understand me before I half understand myself?'' |
45394 | Is an excess of vegetable matter indicated? |
45394 | Is it not also his most direct road to fortune? |
45394 | Is not this a proof of the truth of my theory of respiration? |
45394 | Is there a defect of calcareous matter? |
45394 | Is there a deficiency of vegetable matter? |
45394 | Is there an excess of siliceous sand? |
45394 | MY DEAR POOLE, Have you no thoughts of coming to London? |
45394 | May not the non- respirable gases furnish a class of different stimuli? |
45394 | Pray do you know whether the Zoophyta and marine worms are susceptible of the galvanic stimulus? |
45394 | Suppose three hundred pounds of potatoes feed twenty head of cattle for any given time, how many will the same weight of oats feed? |
45394 | The question then necessarily suggests itself, how far this gas can be safely introduced into the interior of our apartments? |
45394 | What news have you in Cornwall? |
45394 | What, then, might not have been expected from his genius, when applied to a department upon which the light of science had scarcely dawned? |
45394 | Whence a question has arisen, whether, after all, the alkaline base can with propriety be classed under that denomination? |
45394 | Why do you not come to London? |
45394 | Why is this in the order of Nature, that there is such a difference in the duration and destruction of her works? |
45394 | [ 106] For example:--What weight of wheat is equivalent to a given weight of oats, barley, rye,& c.? |
45394 | _ Quere._--How far have the first attempts at generalization arisen from accident, and how far from the resemblance between ideas? |
45394 | was that really Davy? |
45395 | Caught what? |
45395 | Were they originally crystallized,he asks,"and the result of chemical deposition? |
45395 | _ Eubathes._--Is this the only place in Carniola where these animals are found? 45395 _ Halieus._--Do you know why this tint portends fine weather? |
45395 | _ Halieus._--Well, gentlemen, what sport? 45395 _ Physicus._--What can be the reason of this? |
45395 | _ Physicus._--You must have a different fly; or, have you some unguent or charm to tempt the fish? 45395 ''What do you think they will do?'' 45395 --''Stay,''says the Frenchman,''do not deceive yourself; what kind of weather is it now?'' 45395 --Can you explain this omen? 45395 3? 45395 But how was this to be effected? 45395 Can you account for this? 45395 Could you not likewise try a stream of_ cold_ water passing along the bottom of the horizontal flue? 45395 Do you see aught in this state to admire or envy? |
45395 | Have you a dipping needle? |
45395 | In Parliament, how is a question of science treated? |
45395 | Is not this,"says Newton,"on account of an attraction between their particles? |
45395 | Is the metal in its_ dry_ state combined with a minute portion of oxygen, of which_ poling_ deprives it, and thus renders it malleable? |
45395 | Now the question is, what are the changes thus produced in the copper? |
45395 | Now, what are these products? |
45395 | Or, is the effect of the pole merely mechanical, that of closing the grain, and of altering the texture of the metal? |
45395 | Were the salt- water eels and the fresh- water eels which he examined of the same size? |
45395 | What avails the telescope, without the eye of the observer? |
45395 | What could be his object? |
45395 | Will philosophers never feel, with Walpole, that"a genius transmits more honour by blood than he can receive?" |
45395 | Will you have the kindness to hire a pony for me, that I may ride to your hills? |
45395 | [ 41] Granted:--but what connexion has that with the principle of Davy''s lamp, or with any_ Safety_ lamp? |
45395 | [ 54]_ Quere._ Is this theory correct? |
45395 | and does the_ over- poling_ impart to it a minute portion of carbon, and is copper, like iron, thus rendered brittle both by oxygen and carbon? |
45395 | or have they been, as for the most part they are now found, mere mechanical deposits?" |
14474 | What happens? |
14474 | Am I right in supposing that anybody here has played at snapdragon? |
14474 | And going out, why? |
14474 | And how are these candles made? |
14474 | And what do you think the bulk of that water is when it assumes the vaporous condition? |
14474 | And where does all this go? |
14474 | And you might say,"It is nothing; it is not worth chemical attention; what does it do in the air?" |
14474 | And, now that I have immersed it in spirit and applied a light to it, in what way does it differ from an ordinary candle? |
14474 | But can it be steam? |
14474 | But how does the flame get hold of the fuel? |
14474 | But if I shut it off, what becomes of the lamp? |
14474 | But is there nothing else there than nitrogen? |
14474 | But then you have a right to ask me,"How is it that the air and the oxygen do not equally well burn the candle?" |
14474 | But then, beyond that, how is it that the candle does not burn in air as well as in oxygen? |
14474 | But what can this be which we find as the other constituent in water, and which must therefore be that substance which made the hydrogen burn? |
14474 | But what is that black substance? |
14474 | But what will you say when I tell you that my breath will put out that candle? |
14474 | But why does it not burn in that way now, when it is lying in a mass? |
14474 | But, now, what will you think of this fact? |
14474 | By what? |
14474 | Can we get it from the air? |
14474 | Could you do that? |
14474 | Did you see that brilliant light? |
14474 | Do I get carbonic acid? |
14474 | Do you not see that it is_ not_ in the inside? |
14474 | Do you remember this kind of experiment? |
14474 | Do you see that the water has become quite milky? |
14474 | Do you see what happens? |
14474 | Does not that shew you what a large bulk of matter is being evolved? |
14474 | Have you ever seen it? |
14474 | Here it is seeming to boil up famously; but does it boil? |
14474 | How burned? |
14474 | How comes it out of the candle? |
14474 | How is it that this solid gets there, it not being a fluid? |
14474 | How shall we get at this? |
14474 | If I shut the air off, look how it smokes; and why? |
14474 | If the carbon had been like the lead which I shewed you, or the iron which, in burning, produces a solid substance, what would happen? |
14474 | Is it anything else? |
14474 | Is it hydrogen? |
14474 | Is it not beautiful to think that such a process is going on, and that such a dirty thing as charcoal can become so incandescent? |
14474 | Is not that a very pretty experiment? |
14474 | It evidently comes, as to part of it, from the candle; but is it within the candle beforehand? |
14474 | Now, I have no doubt you will ask, how is it that the oil, which will not burn of itself, gets up to the top of the cotton, where it will burn? |
14474 | Now, what is the circumstance which makes the lead and carbon differ in this respect? |
14474 | Now, why is this? |
14474 | Now, why is this? |
14474 | Oxygen, as you will immediately imagine, exists in the atmosphere; for how should the candle burn to produce water without it? |
14474 | Suppose I take this candle, and hold a piece of paper close upon the flame, where is the heat of that flame? |
14474 | Suppose, in place of having nitrogen, or nitrogen and oxygen, we had pure oxygen as our atmosphere; what would become of us? |
14474 | Then, what becomes of it? |
14474 | There is our candle burning in the air: how will it burn in oxygen? |
14474 | There it is standing over the water, and it can not therefore be steam, but must be a permanent gas of some sort What is it? |
14474 | This is a very combustible substance; and if it be so combustible in air, what might you expect it would be in oxygen? |
14474 | This is the first part of our experiment; and now, what follows? |
14474 | We find one of these is hydrogen: what must that other be which was in the water before the experiment, and which we now have by itself? |
14474 | What diamond can shine like flame? |
14474 | What do you think of the contents of that box above there, which I have had made for the purpose? |
14474 | What is all that smoke? |
14474 | What is its nature? |
14474 | What is set free when I put it in the water, as I am about to do again? |
14474 | What shall we call it, A, B, or C? |
14474 | What, then, are the comparative weights of these substances? |
14474 | What, then, is happening? |
14474 | When you have put the spirit into the dish, you have the cup and the fuel; and are not the raisins acting like the wicks? |
14474 | Where, then, is this water which we get from a candle? |
14474 | Why does a piece of potassium decompose water? |
14474 | Why does it hold? |
14474 | Why does it occur?" |
14474 | Why is my hand fastened to this place, and why am I able to pull this pump about? |
14474 | Why is that? |
14474 | Why is this? |
14474 | Why? |
14474 | You have asked me several times, and I am very glad you have,"How do you weigh gases?" |
14474 | You have here a solid substance with no vessel to contain it; and how is it that this solid substance can get up to the place where the flame is? |
14474 | You would be puzzled for a good while if I asked you what the state of this vessel is, what is inside it, and why it is there? |
14474 | [ A light was then applied, when the hydrogen burnt] What is there now in the other jar? |
14474 | how is it that I can hardly get my hand away? |
14474 | or, when it is made a fluid, then how is it that it keeps together? |
12787 | ( b) how many grams of pure anhydrous sodium carbonate( Na_{2}CO_{3}) will be neutralized by a portion of it? |
12787 | ( c) how many grams of silver will there be in the silver chloride formed when an excess of silver nitrate is added to a portion? |
12787 | ( d) how many grams of iron will be dissolved to FeCl_{2} by a portion of it? |
12787 | .90 containing 28.33% NH_{3} by weight)? |
12787 | 0.96 containing 9.91% NH_{3} by weight) are required to neutralize the acid and precipitate the iron as ferric hydroxide? |
12787 | 1.04 containing 75 grams SO_{2} per liter) are required to reduce the iron in 1 gram of ferric alum( KFe(SO_{4})_{2}.12H_{2}O)? |
12787 | 1.05 containing 9.0% HNO_{3} by weight) is required to oxidize the iron in one gram of FeSO_{4}.7H_{2}O in the presence of sulphuric acid? |
12787 | 1.18 containing 24.7% H_{2}SO_{4} by weight) must be added to the mixture in order to bring the aluminium into solution? |
12787 | 1.20 containing 39.80 per cent HCl by weight) are required to furnish 36.45 grams of the gaseous compound? |
12787 | 1.350 containing 55.79% HNO_{3} by weight) for oxidation of the iron? |
12787 | ;( d) to give a precipitate of barium sulphate weighing 0.4320 gram? |
12787 | Assuming the impure NaOH used originally in making the titrating solution consisted of NaOH and Na_{2}CO_{3} only, what per cent of each was present? |
12787 | How many cubic centimeters of 0.1 normal acid or alkali must be added to exactly neutralize the solution? |
12787 | How many cubic centimeters of 1.075 N acid or alkali will have to be added to make the solution exactly neutral? |
12787 | How many cubic centimeters of normal KMnO_{4} will be required to determine the calcium oxide volumetrically in a 1 gram sample of the lime? |
12787 | How many grams of Mn_{3}O_{4} can be obtained from 1 gram of MnO_{2}? |
12787 | How many grams of pure potassium hydroxide are required for exactly 1 liter of normal alkali solution? |
12787 | How many grams of the carbonate actually combined with the silica in fusion, and what was the loss in weight due to carbon dioxide during the fusion? |
12787 | How much water must be added to a liter of the oxalate solution to make it exactly 0.025 N as a reducing agent? |
12787 | Is the resulting solution acid or alkaline? |
12787 | Is the solution acid or alkaline? |
12787 | NaOH sol.? |
12787 | To what volume must it be diluted? |
12787 | To what volume must the solution be diluted to make it exactly 0.1 N as a reducing agent? |
12787 | What are the percentages of Na_{2}O and K_{2}O in the feldspar? |
12787 | What fraction of this volume of acid is used for oxidation? |
12787 | What is its normal value? |
12787 | What is the correct percentage of calcium in the sample, and what is the percentage error? |
12787 | What is the equivalent in grams of Na_{2}HPO_{4}( a) as a phosphate;( b) as a sodium salt? |
12787 | What is the formula of the oxide, FeO, Fe_{2}O_{3}, or Fe_{3}O_{4}? |
12787 | What is the normal value of a sulphuric acid solution which has a specific gravity of 1.839 and contains 95% H_{2}SO_{4} by weight? |
12787 | What is the normal value of the alkali? |
12787 | What is the normal value of the hydrochloric acid? |
12787 | What is the normal value of the solution( a) as an acid, and( b) as a reducing agent? |
12787 | What is the normal value of the stannous chloride solution as a reducing agent? |
12787 | What is the normal value of the thiosulphate? |
12787 | What is the normality of the nitric acid when used as an acid? |
12787 | What is the percentage composition of the brass? |
12787 | What is the percentage of MnO_{2}, in the sample? |
12787 | What is the percentage of NaOH and Na_{2}CO_{3}? |
12787 | What is the percentage of bromine? |
12787 | What was the error, percentage error, and what weight of sulphur dioxide was in the solution? |
12787 | What weight of Mg_{2}P_{2}O_{7} could be obtained from a 3-gram sample of the limestone? |
12787 | What will be the weight of the ignited precipitate? |
12787 | Who would lose and why? |
12787 | and 763 mm., shall equal the percentage of CaO in the sample? |
12787 | are to be used? |
12787 | equivalent to 0.0300 gram Na_{2}S_{2}O_{3}) in terms of As_{2}O_{3}? |
12787 | of 0.1072 N hydrochloric acid on an excess of calcium carbonate, and how many grams of CaSO_{4} will be formed? |
12787 | of 0.4 N phosphoric acid in order that the resulting solution may be 0.6 N? |
12787 | of KMnO_{4} were used, to what oxide was the molybdenum reduced? |
12787 | of a potassium carbonate solution, what is the normal value of the carbonate solution? |
12787 | of it in terms of iodine? |
12787 | of normal KMnO_{4} to oxidize it back to MoO_{3}, what is the percentage of P_{2}O_{5}? |
12787 | of solution in the analysis? |
12787 | of the alkali to make it exactly 0.5 N.? |
12787 | of the aqueous hydrochloric acid? |
12787 | of the basic solution? |
12787 | of the mixture are required, how many grams of MgCl_{2} per liter does the solution contain? |
12787 | of the permanganate in terms of( a) Fe,( b) H_{2}C_{2}O_{4}.2H_{2}O? |
12787 | pressure, is given off during ignition, if the resulting oxide weighs 0.2606 gram? |
12787 | to just reduce the iron in the above? |
12787 | will liberate 0.0175 gram of I_{2} from KI? |
20848 | ( a) 10 g. of common salt were dissolved in water and the solution evaporated to dryness; what weight of solid was left? |
20848 | ( a) Does dry sulphur dioxide react with litmus paper? |
20848 | ( a) How many cubic centimeters of aqueous vapor are formed? |
20848 | ( a) How many grams of the substance remained in solution? |
20848 | ( a) In what respects does the use of the Welsbach mantle resemble that of lime in the calcium light? |
20848 | ( a) What is the formula for antimony chloride? |
20848 | ( a) What is the weight of 100 l. of hydrogen measured in a laboratory in which the temperature is 20 ° and pressure 750 mm.? |
20848 | ( a) What two sulphur compounds are likely to be formed when gas is made from such coal? |
20848 | ( a) What weight of hydrogen can be obtained from 150 g. of sulphuric acid? |
20848 | ( a) What weight of oxygen can be obtained from 100 g. of water? |
20848 | ( a) What weight of water can be formed by the combustion of 100 L of hydrogen, measured under standard conditions? |
20848 | ( a) When a given weight of water freezes, does it absorb or evolve heat? |
20848 | ( a) Why does not the water of the ocean freeze? |
20848 | ( a) Would the same amount of heat be generated by the combustion of 1 g. of each of the allotropic modifications of sulphur? |
20848 | ( b) 10 g. of zinc were dissolved in hydrochloric acid and the solution evaporated to dryness; what weight of solid was left? |
20848 | ( b) How can it be shown that a solution of sulphur dioxide in water acts like an acid? |
20848 | ( b) If the mantle were made of carbon, would it serve the same purpose? |
20848 | ( b) In what respects are the reactions similar? |
20848 | ( b) What gas and how much of it remains in excess? |
20848 | ( b) What important law does this series of substances illustrate? |
20848 | ( b) What volume would this occupy under standard conditions? |
20848 | ( b) What volume would this occupy under standard conditions? |
20848 | ( b) What volume would this occupy under standard conditions? |
20848 | ( b) What was the strength of the solution at 18 °? |
20848 | ( b) What was the volume of each? |
20848 | ( b) What weight of sulphuric acid is necessary to prepare this amount of hydrogen? |
20848 | ( b) When the resulting ice melts, is the total heat change the same or different from that of freezing? |
20848 | ( b) Why will ice and salt produce a lower temperature than ice alone? |
20848 | ( b) Would the same amount of sulphur dioxide be formed in each case? |
20848 | ( b)What volume of oxygen would be required in( a)? |
20848 | ( c) How much water had been used in the experiment? |
20848 | ( c) How would you account for the color of the copper sulphate solution? |
20848 | ( c)What weight of potassium chlorate is necessary to prepare this amount of oxygen? |
20848 | 10 g. of zinc were used in the preparation of hydrogen; what weight of iron will be required to prepare an equal volume? |
20848 | 12, why is it necessary to dry the hydrogen by means of the calcium chloride in the tube X? |
20848 | 14, will the flame remain at the mouth of the tube? |
20848 | 24)? |
20848 | = 1.2) to be worth six cents a pound, what is the value of the acid generated in the preparation of 1 ton of sodium carbonate by the Le Blanc process? |
20848 | Apart from its color, why should carbon be useful in the preparation of inks and paints? |
20848 | Are lampblack and bone black allotropic forms of carbon? |
20848 | Are your results in accord with the experimental facts? |
20848 | As ordinarily carried out, does the reaction complete itself? |
20848 | At what pressure would the weight of 1 l. of hydrogen be equal to that of oxygen under standard conditions? |
20848 | At what temperature will its volume be doubled? |
20848 | Can a metal itself be an alkali? |
20848 | Can ammonia be dried by passing the gas through concentrated sulphuric acid? |
20848 | Can combustion take place without the emission of light? |
20848 | Can sulphuric acid be used to dry hydrosulphuric acid? |
20848 | Can you suggest any reason why the growth of clover in a field improves the soil? |
20848 | Cl_{2}O is the anhydride of what acid? |
20848 | Could a solution of sodium hydroxide be substituted for the solution of calcium hydroxide in testing for carbon dioxide? |
20848 | Could asbestos fibers be used to replace the wire in a safety lamp? |
20848 | Could barium hydroxide be used in place of calcium hydroxide in testing for carbon dioxide? |
20848 | Could calcium chloride be used in place of barium chloride in testing for sulphates? |
20848 | Could lead nitrate be used in place of barium chloride in testing for sulphates? |
20848 | Could limestone be completely decomposed if heated in a closed vessel? |
20848 | Could phosphoric acid be substituted for sulphuric acid in the preparation of the common acids? |
20848 | Does dry hydrosulphuric acid react with litmus paper? |
20848 | Does this color increase in intensity on standing? |
20848 | For what is calcium chlorate used? |
20848 | From the method of preparation of platinum, what metal is likely to be alloyed with it? |
20848 | From their behavior toward sulphuric acid, to what class of agents do hydrobromic and hydriodic acids belong? |
20848 | How can bromine vapor and nitrogen peroxide be distinguished from each other? |
20848 | How can you prove that the composition of the different allotropic forms of carbon is the same? |
20848 | How could the amount of water in a food such as bread or potato be determined? |
20848 | How could the presence of air dissolved in water be detected? |
20848 | How could you detect arsenic, antimony, or copper in lead? |
20848 | How could you detect lead if present in tin foil? |
20848 | How could you determine the total amount of solid matter dissolved in a sample of water? |
20848 | How could you determine whether a given sample of water is distilled water? |
20848 | How could you distinguish between a chloride, a bromide, and an iodide? |
20848 | How could you distinguish between carbonates and sulphites? |
20848 | How could you distinguish between magnesium chloride and magnesium sulphate? |
20848 | How could you distinguish between mercurous chloride and mercuric chloride? |
20848 | How could you distinguish between oxygen, hydrogen, and nitrogen? |
20848 | How could you distinguish between oxygen, hydrogen, nitrogen, nitrous oxide, and carbon dioxide? |
20848 | How could you distinguish between potassium chloride and potassium iodide? |
20848 | How could you distinguish between them? |
20848 | How could you judge of the relative purity of different forms of carbon? |
20848 | How could you prepare pure silver chloride from a silver coin? |
20848 | How could you prove that the water in crystals of common salt is not water of crystallization? |
20848 | How could you prove the formation of carbon dioxide and water in the combustion of illuminating gases? |
20848 | How do we account for the fact that liquid hydrofluoric acid is not an electrolyte? |
20848 | How do you account for the difference? |
20848 | How do you account for the fact that a candle burns with a flame? |
20848 | How do you account for the fact that a precipitate of silver chloride is not formed? |
20848 | How do you account for the flame sometimes observed when it burns? |
20848 | How do you explain the foaming of soda water? |
20848 | How does pyrolusite effect the decolorizing of glass containing iron? |
20848 | How is this accounted for? |
20848 | How many liters of hydrogen measured under standard conditions can be obtained from the action of 8 g. of iron on 10 g. of sulphuric acid? |
20848 | How many liters of nitrous oxide, measured under standard conditions, can be prepared from 10 g. of ammonium nitrate? |
20848 | How much iron sulphate( FeSO_{4}) will be formed? |
20848 | How much of each substance had been used? |
20848 | How much water by weight would result? |
20848 | How much zinc sulphate will be formed? |
20848 | How would you account for the fact that normal copper sulphate is slightly acid to litmus? |
20848 | How would you account for the fact that solutions of the different salts of a metal usually have the same color? |
20848 | How would you expect potassium aurate and platinate to be formed? |
20848 | If 10 l. of air, measured under standard conditions, is passed over 100 g. of hot copper, how much will the copper gain in weight? |
20848 | If arsenopyrite is heated in a current of air, what products are formed? |
20848 | If steam is heated to 2000 ° and again cooled, has any chemical change taken place in the steam? |
20848 | If the Gay- Lussac tower were omitted from the sulphuric acid factory, what effect would this have on the cost of production of sulphuric acid? |
20848 | In the amalgamation process for extracting silver, how does ferrous chloride convert silver chloride into silver? |
20848 | In the commercial preparation of carbon disulphide, what is the function of the electric current? |
20848 | In the decomposition of this weight of the dioxide into water and oxygen, what volume of oxygen( measured under standard conditions) is evolved? |
20848 | In the manufacture of cast iron, why is the air heated before being forced into the furnace? |
20848 | In the preparation of nitrogen from the air, how would hydrogen do as a substance for the removal of the oxygen? |
20848 | In the preparation of phosphine, why is coal gas passed into the flask? |
20848 | In what proportion must acetylene and oxygen be mixed to produce the greatest explosion? |
20848 | In what respects are carbonic and sulphurous acids similar? |
20848 | In what respects are these elements similar? |
20848 | In what respects do they differ? |
20848 | In what respects does aluminium oxide differ from calcium oxide in properties? |
20848 | In what respects does nitrogen resemble the members of the phosphorus family? |
20848 | Is a chemical change always accompanied by a physical change? |
20848 | Is a physical change always accompanied by a chemical change? |
20848 | Is it possible for a substance to contain both mechanically inclosed water and water of crystallization? |
20848 | Is oxidation always accompanied by reduction? |
20848 | Is the equation for the preparation of hydrosulphuric acid a reversible one? |
20848 | Is the evolution of light always produced by combustion? |
20848 | Is the molecule and the atom of oxygen the same thing? |
20848 | Is the reaction expressed by the equation 2H+ O= H_{2}O reversible? |
20848 | Is the reaction expressed by the equation NH_{3}+ H_{2}O= NH_{4}OH reversible? |
20848 | Sulphur and oxygen both belong in Group VI, although in different families; in what respects are the two similar? |
20848 | Suppose that an element were discovered that filled the blank in Group O, Period 5; what properties would it probably have? |
20848 | Suppose that an element were discovered that filled the blank in Group VI, Period 9, family B; what properties would it have? |
20848 | Suppose that hydrosulphuric acid were a liquid, would it be necessary to modify the method of preparation? |
20848 | Suppose that the maximum density of water were at 0 ° in place of 4 °; what effect would this have on the formation of ice on bodies of water? |
20848 | The question arises then, How can we account for the difference in their properties? |
20848 | The question arises, Do these substances in turn contain other substances, that is, are they also chemical compounds? |
20848 | The test question in all cases is, Has the composition of the substance been changed? |
20848 | To what class of changes do the following belong? |
20848 | To what is the bleaching action due in each case? |
20848 | To what is the blue color due? |
20848 | To what is the blue color of liquid air due? |
20848 | What acid should be used? |
20848 | What are the products of hydrolysis when stannic chloride is used as a mordant? |
20848 | What carbonates are soluble? |
20848 | What component is present in concentrated sulphuric acid that is almost wanting in very dilute sulphuric acid? |
20848 | What compound would be formed by passing carbon dioxide into a solution of ammonium hydroxide? |
20848 | What compounds would you expect phosphorus to form with bromine and iodine? |
20848 | What effect would doubling the pressure have upon the solubility of carbon dioxide in water? |
20848 | What essential constituent of the air is found in larger amount in manufacturing districts than in the open country? |
20848 | What hydroxide studied, other than zinc hydroxide, has both acid and basic properties? |
20848 | What hydroxides other than aluminium hydroxide have both acid and basic properties? |
20848 | What important point does this suggest? |
20848 | What impurities would you expect to find in the copper sulphate prepared from the refining of silver? |
20848 | What is an alkali? |
20848 | What is formed when a metal dissolves in each of the following? |
20848 | What is meant by the statement that hydrochloric acid is one of the strongest acids? |
20848 | What is meant by the term polysilicic acid, as used in the discussion of aluminium silicates? |
20848 | What is the compound? |
20848 | What is the derivation of the word nascent? |
20848 | What is the exact use of lime in this instrument? |
20848 | What is the meaning of the following words? |
20848 | What is the meaning of the phrase_ aqua regia_? |
20848 | What is the minimum weight of carbon which must be added in order that the steel may be made to take a temper? |
20848 | What is the significance of the term fluorspar? |
20848 | What is the source of heat in the lime light? |
20848 | What metals already studied are prepared by electrolysis? |
20848 | What metals and compounds studied are prepared by electrolysis? |
20848 | What non- metallic element is obtained from the deposits of Chili saltpeter? |
20848 | What other chlorides would act in the same way? |
20848 | What other gases would serve the same purpose? |
20848 | What precautions would this suggest in the use of platinum vessels? |
20848 | What products were left in the flask, and how much of each was present? |
20848 | What properties have the alkaline- earth metals in common with the alkali metals? |
20848 | What properties have the metals of the magnesium family in common with the alkali metals; with the alkaline- earth metals? |
20848 | What property of magnesium was taken advantage of in the isolation of argon? |
20848 | What reaction would you expect to take place when lead peroxide is treated with hydrochloric acid? |
20848 | What substances already studied are prepared from the following compounds? |
20848 | What substances studied are used as bleaching agents? |
20848 | What substances studied are used as disinfecting agents? |
20848 | What substances were formed and how much of each? |
20848 | What sulphates other than lead are insoluble? |
20848 | What test question must be applied in each of the above cases? |
20848 | What two properties must the mantle used in the Welsbach lamp possess? |
20848 | What volume of oxygen will be given off at the same time, measured under standard conditions? |
20848 | What volume would it occupy if the atmospheric pressure changed so that the reading became 750 mm.? |
20848 | What volume would the 150 g. of the acid occupy? |
20848 | What volume would this gas occupy under standard conditions? |
20848 | What volume would this occupy under standard conditions? |
20848 | What was the strength of the acid solution? |
20848 | What was the strength of the sodium hydroxide solution in parts per hundred? |
20848 | What weight of ammonium chloride is necessary to furnish enough ammonia to saturate 1 l. of water at 0 ° and 760 mm.? |
20848 | What weight of barium sulphate will be formed at the same time? |
20848 | What weight of carnallite is necessary in the preparation of 500 g. of magnesium? |
20848 | What weight of carnallite would be necessary in the preparation of 1 ton of potassium carbonate? |
20848 | What weight of copper is necessary to prepare 50 l. of nitric oxide under standard conditions? |
20848 | What weight of each of the following compounds is necessary to prepare 50 l. of oxygen? |
20848 | What weight of ferrochromium containing 40% chromium must be added to a ton of steel to produce an alloy containing 1% of chromium? |
20848 | What weight of gypsum is necessary in the preparation of 1 ton of plaster of Paris? |
20848 | What weight of nitrogen can be obtained from 10 l. of air measured under the conditions of temperature and pressure which prevail in your laboratory? |
20848 | What weight of potassium chlorate is necessary to prepare 250 l. of oxygen at 20 ° and 750 mm.? |
20848 | What weight of potassium nitrate is necessary to furnish the same weight of acid? |
20848 | What weight of sodium chloride is necessary to prepare sufficient hydrochloric acid to saturate 1 l. of water under standard conditions? |
20848 | What weight of sodium hydroxide is necessary to neutralize the carbonic acid formed by the action of hydrochloric acid on 100 g. of calcium carbonate? |
20848 | What weight of the compound Mn_{3}O_{4} will be formed by strongly heating 25 g. of manganese dioxide? |
20848 | What weight of the permanganate was required? |
20848 | What weight of tin could be obtained by the reduction of 1 ton of cassiterite? |
20848 | What weight of water can be obtained from 150 g. of this substance? |
20848 | What weight of water is necessary to slake the lime obtained from 1 ton of pure calcium carbonate? |
20848 | What weight of zinc can be dissolved in 10 g. of sulphuric acid? |
20848 | What would become of these metals in refining by parting with sulphuric acid? |
20848 | What would take place if a bit of potassium hydroxide were left exposed to the air? |
20848 | What would take place when solutions of silver nitrate and sodium chloride are brought together? |
20848 | When this solution is treated with zinc, will hydrogen be evolved? |
20848 | Why are the inner walls of a Dewar bulb sometimes coated with a film of silver? |
20848 | Why did Dalton assume that all the atoms of a given element have the same weight? |
20848 | Why do most acids decompose carbonates? |
20848 | Why does a solution of disodium hydrogen phosphate react alkaline? |
20848 | Why does charcoal usually burn with no flame? |
20848 | Why does shaking or stirring make a solid dissolve more rapidly in a liquid? |
20848 | Why does sulphuric acid liberate hydrofluoric acid from its salts? |
20848 | Why does the chemist use distilled water in making solutions, rather than filtered water? |
20848 | Why does the use of the bellows on the blacksmith''s forge cause a more intense heat? |
20848 | Why does the water from some natural springs effervesce? |
20848 | Why is brine used in the manufacture of artificial ice? |
20848 | Why is lead so extensively used for making water pipes? |
20848 | Why is oxygen passed through the inner tube of the oxyhydrogen blowpipe rather than the outer? |
20848 | Why is the silver sulphide first changed into silver chloride? |
20848 | Why must chlorine water be kept in the dark? |
20848 | Why must gold ores be roasted in the chlorination process? |
20848 | Why will vegetables cook faster when boiled in strong salt water than when boiled in pure water? |
20848 | Will a definite weight of iron decompose an unlimited weight of steam? |
20848 | Will equal amounts of heat be liberated in the combustion of 1 g. of each? |
20848 | Would anthracite coal be suitable for the manufacture of coal gas? |
20848 | Would combustion be more intense in liquid air than in the gaseous substance? |
20848 | Would ice frozen from impure water necessarily be free from disease germs? |
20848 | and the temperature 0 °? |
20848 | between Glauber''s salts and Epsom salts? |
20848 | between sodium chloride and ammonium chloride? |
20848 | between sodium nitrate and potassium nitrate? |
20848 | bottles in your laboratory( the gas to be collected over water)? |
20848 | of 98% sulphuric acid? |
20848 | of aluminium? |
20848 | of borax contain? |
20848 | of carbon dioxide at 20 ° and 750 mm.? |
20848 | of commercial nitric acid? |
20848 | of common hydrogen dioxide solution? |
20848 | of copper in sulphuric acid and crystallizing the product from water? |
20848 | of mercuric oxide? |
20848 | of minium? |
20848 | of oxygen was exploded in a eudiometer,( a) What gases remained in the tube after the explosion? |
20848 | of phosphorus? |
20848 | of sodium sulphite? |
20848 | of sulphuric acid having a density of 1.84? |
20848 | of the anhydrous salt yield? |
20848 | of the ordinary hydrogen dioxide solution? |
20848 | pressure? |