2.consider a 20 l sample of moist air at 60 °c under a total pressure of 1 atm. in which the partial pressure of water vapor is 0.120 atm. assume the mole % composition of dry air is: 78% n2; 21% o2; 1% ar. a) what are the mole percentages of each of the gases in the sample? b) what volume must the mixture occupy at 60 °c if the relative humidity is to be 100%? (relativehumidity is defined as pw/pwox100 where pwis the partial pressure of water vapor in the sample and pwois the equilibrium vapor pressure of water at that temperature. at 60 °c pwo= 0.197 atm.) your answer should be in liters.