question_answer

At 760 torr pressure and \[20{}^\circ C\]temperature, 1 L of water dissolves 0.04 gm of pure oxygen or 0.02 gm of pure nitrogen. Assuming that dry air is composed of 20% oxygen and 80% nitrogen (by volume), the masses (in g/L) of oxygen and nitrogen dissolved by 1 L of water at \[20{}^\circ C\]exposed to air at a total pressure of 760 torr are respectively: 

A) 0.008, 0.016                 

B) 0.016, 0.008

C) 0.16, 0.08                     

D) 0.04, 0.02