Give the composition of nitrogen and oxygen by volume in air.

What is the composition of air?

Write down the composition of air.

What is the % composition of nitrogen by weight in air ?

The number of moles of oxygen in 1 L of air containing 21% oxygen by volume, in standard conditions, is

At 760 torr pressure and 20^(@)C tempreature , 1 L of water dissolves 0.04 gm of pure oxygen or 0.02 gm of pure nitrogen. Assuming that dry air is compound of 20% oxygen and 80% nitrogen (by volume), the masses (in g/L) of oxygen and nitrogen dissolved by 1 L of water at 20^(@)C exposed to air at a total pressur of 706 torr are respectively :