you are given an unknown gaseous binary compound. when 10.0g of the compound isburned in excess oxygen, 16.3g of water is produced. the compound has 1.38 times that of oxygen gas at the same conditions of temperature and pressure. give a possible identity for the compound.
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you are given an unknown gaseous binary compound. when 10.0g of the compound isburned in excess oxygen, 16.3g of water is produced. the compound has a density 1.38 times that of oxygen gas at the same conditions of temperature and pressure. give a possible identity for the compound
molar mass oxygen = 32/22.4 = about 1.43 and that time 1.38 = about 1.97.
So the molar mass of the unknown gas must be 22.4 x 1.97 = about 44 and it must contain H. I ran through the acids (HF, HCl, H2S, NH3, PH3, etc and there is no density that will match 1.97 or even that close and none with a molar mass of 44. But propane, a gas, C3H8 does. See if that will produce 16.3 g H2O and check is density.
So the molar mass of the unknown gas must be 22.4 x 1.97 = about 44 and it must contain H. I ran through the acids (HF, HCl, H2S, NH3, PH3, etc and there is no density that will match 1.97 or even that close and none with a molar mass of 44. But propane, a gas, C3H8 does. See if that will produce 16.3 g H2O and check is density.
3 answers