Chemistry - Mole Concept Question with Solution | TestHub

Molar mass of dioxygen ($O_2$) is $32{\text{ g mol}}^{-1}$.

Number of moles of $O_2=\frac{64}{32}=2\text{ moles}$.

At STP, the volume occupied by $1\text{ mole}$ of a gas is $22.4\text{ L}$.

Volume occupied by $2\text{ moles}$ of $O_2=2\times 22.4=44.8\text{ L}$.

Answer: $44.8\text{ L}$