# What is the volume of 4.50 mol of SO_2 at STP?

The molar volume of an ideal gas at $S T P$ is $22.4$ ${\mathrm{dm}}^{3}$.
If we assume the behaviour of $S {O}_{2}$ to be ideal, the volume of the given quantity of gas is $4.5 \times 22.4$ ${\mathrm{dm}}^{3}$. It is likely that $S {O}_{2}$ would show some deviation from ideality at this temperature, but the value would be good for a first approximation.