Question

What volume of `SO_2` has the same number of molecules as 24.0 L of `CO_2` when both are at STP?

Answer 1

`24.0 "L"`

Explanation:

A useful law to remember is Avogadro's hypothesis:

Equal volumes of gases at the same temperature and pressure contain equal numbers of molecules.

Therefore, at the same temperature and pressure conditions, two gases will contain equal numbers of molecules if they occupy the same volume. Thus, `24.0"L"` of `"SO"_2` will have the same number of molecules as `24.0"L"` of `"CO"_2` (both at standard temperature and pressure).