Henry's law constant for oxygen and nitrogen dissolved in water at 298 K are `2.0 xx 10^(9)` Pa and` 5.0 xx 10^(9)` Pa , respectively . A sample of water at a temperature just above 273 K was equilibrated with air (20% oxygen and 80% nitrogen ) at 1 atm. The dissolved gas was separated from a sample of this water and the dried. Determine the composition of this gas.

Answer

Amount percent of `"O"_(2)=38.27%,` Amount percentage of `"N"_(2)=61.73%`