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

##### 1 Answer

May 26, 2017

#### Answer:

#### 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,