# How many molecules are contained in 134.5 L of #O_2# at STP?

##### 1 Answer

Jan 21, 2016

#### Explanation:

At STP, 1 mole of all gases occupies a volume of

Therefore, since

Therefore this volume contains

But 1 mole contains an Avagadro number of particles, ie

Therefore by ration and proportion, 6 moles of oxygen will contain