An Elementary Study of Chemistry
An Elementary Study of Chemistry
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In our eReader you can find the full English version of the book. Read An Elementary Study of Chemistry Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book An Elementary Study of Chemistry
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2. Multiply by 0.9046 to make the comparison with oxygen molecules.
3. Multiply by 32 to make the comparison with the unit for atomic weights.
We have, then, the formula : molecular weight = density X 0.9046 X 32.; or, still more briefly, ^ M. =D. X28.9.
The value found by this method for the determination of molecular weights will of course agree with those found 230 AN ELEMENTARY STUDY OF CHEMISTRY by calculating the weight of 22.4 1. of the gas, since both methods depend on the same principl...es.
Determination of densities of gases. The relative weights of equal volumes of two. gases can be easily determined. The following is one of the methods used. A small flask, such as is shown in Fig. 69, is filled with one of the gases, and after the temperature and pressure have been noted the flask is sealed up and weighed. The tip of the sealed end is then broken off, the flask filled with the second gas, and its weight determined.
If the weight of the empty flask is subtracted from these two weighings, the relative weights of the gases is readily found.
What to read after An Elementary Study of Chemistry?
You can find similar books in the "Read Also" column, or choose other free books by Macpherson, William, 1812-1893 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
2. Multiply by 0.9046 to make the comparison with oxygen molecules.
3. Multiply by 32 to make the comparison with the unit for atomic weights.
We have, then, the formula : molecular weight = density X 0.9046 X 32.; or, still more briefly, ^ M. =D. X28.9.
The value found by this method for the determination of molecular weights will of course agree with those found 230 AN ELEMENTARY STUDY OF CHEMISTRY by calculating the weight of 22.4 1. of the gas, since both methods depend on the same principl...es.
Determination of densities of gases. The relative weights of equal volumes of two. gases can be easily determined. The following is one of the methods used. A small flask, such as is shown in Fig. 69, is filled with one of the gases, and after the temperature and pressure have been noted the flask is sealed up and weighed. The tip of the sealed end is then broken off, the flask filled with the second gas, and its weight determined.
If the weight of the empty flask is subtracted from these two weighings, the relative weights of the gases is readily found.
What to read after An Elementary Study of Chemistry?
You can find similar books in the "Read Also" column, or choose other free books by Macpherson, William, 1812-1893 to read onlineMoreLess
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