# What volume is occupied by #4.02 * 10^22# molecules of helium gas at STP?

##### 1 Answer

Feb 11, 2016

#### Answer:

The molar volume of an ideal gas at STP is

#### Explanation:

In one mole of gas there are Avogadro's number of particles. There are

So how many moles are there in

It is simply the quotient:

The volume of course is the prior quotient mulitplied by the molar volume of an ideal gas: