Question

The vapour density of a gas is 11.2. The volume occupied by 10 g of the gas at STP is

• A. 10 L
• B. 1 L
• C. 11.2 L
• D. 5.6 L

Answer 1

The correct option is A

10 L

$M=2\times VD=2\times 11.2=22.4$
$PV=\frac{W}{M}RT$
$V=\frac{W}{M}\frac{RT}{P}=\frac{10\times 0.0821\times 273}{22.4\times 1}$
$V=10lit$