56.00cm3 of a gas at S.T.P. weighed 0.11g. What is the vapour density of the gas?
[Molar volume of a gas at S.T.P = 22.4dm3]
[Molar volume of a gas at S.T.P = 22.4dm3]
-
A.
11.00 -
B.
22.00 -
C.
33.00 -
D.
44.00
Correct Answer: Option B
Explanation
56.00cm3 of a gas at S.T.P weighed 0.11g
Molar volume of the gas = 22.4dm3 = 22400cm3
molar mass = (22400 x 0.11)/56
molar mass = 2464/56 = 44
Vapour density = Molar mass/2 = 44/2 = 22