posted by anu on .
1) 1.12 dm3 of a gas at STP is found to weigh 3.55g.Find molecular weight and vapour density of gas
2)5.6 dm3 of a gas at STP weighs 11g Find out its relative molecular mass & vapour density
n = mols of gas = 1.12/22.4 = ?
n = grams/molar mass. You have grams and n, solve for molar mass.
Then vapor density = molar mass/molar mass H2 = molar mass/2.016 = ?
2. See #1.