This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1893 edition. Excerpt: ... of chlorine consists of two atoms. When hydrogen and chlorine combine, one atom of one combines with one of the other, so that from one molecule of hydrogen and one of chlorine two molecules of hydrochloric-acid gas are formed. The number of molecules is the same after combination as before, and therefore the ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1893 edition. Excerpt: ... of chlorine consists of two atoms. When hydrogen and chlorine combine, one atom of one combines with one of the other, so that from one molecule of hydrogen and one of chlorine two molecules of hydrochloric-acid gas are formed. The number of molecules is the same after combination as before, and therefore the product occupies the same volume as the uncombined gases. When hydrogen combines with oxygen, however, two atoms of hydrogen combine with one of oxygen. The reaction is represented thus: 2H, + Oa = 2HaO. In this case two molecules of hydrogen and one molecule of oxygen give two molecules of water, and the volume of the product in the form of vapor is only two thirds that of the combining gases. The reaction between nitrogen and hydrogen is represented thus: 3H, + N, = 2NH, . Or, from four molecules only two are obtained. Consequently the volume of the product is only half that of the uncombined gases. How a Formula is Determined.--Chemical formulas were first introduced for the purpose of expressing the composition of substances. They might be used for this purpose at present without having any connection whatever with the conception of atoms and molecules, but the difficulty would then be to decide upon the combining weights of the elements. It would be possible for authoritative bodies to unite in issuing an edict that the combining weights of the elements shall be certain figures which are in harmony with facts known. But this would hardly be a scientific mode of procedure; and there might exist differences of opinion in regard to the advisability of accepting the figures. When, however, we once accept the atomic theory and the law of Avogadro, we have a definite basis to work on, and there is little opportunity for disagreement in regard..
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Add this copy of An Introduction to the Study of Chemistry to cart. $23.14, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
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