Chemistry - Mole Concept Question with Solution | TestHub

Molar mass of the gas $=2\times \text{Vapour density}$

Molar mass $=2\times 16=32\text{ g/mol}$

Number of moles of the gas $=\frac{\text{Mass}}{\text{Molar mass}}=\frac{8}{32}=0.25\text{ mol}$

Volume of $1\text{ mole}$ of an ideal gas at STP $=22.4{\text{ dm}}^3$

Volume occupied by $0.25\text{ mol}$ of the gas $=0.25\times 22.4=5.6{\text{ dm}}^3$

Answer: $5.6{\mathrm{dm}}^3$