# Find the number of air molecules in a room of volume 12mcube. Given one mole of air at NTP occupies a volume of 22.4liters

Dear Student,

Given that the gas volume is
So, the volume of one mole of gas is 22.4 l. Therefore,

Number of moles in gas is,

As we know, one mol of gas will have avagadro number of molecules. Therefore, the total number of molecules are,

$N=nA=535.7×6.02×{10}^{23}=3.25×{10}^{26}$