A countercurrent absorption tower is used to strip SO2 (sulfur dioxide) from the gas produced by a smelter. The gas from the smelter contains 4,5 %-by-volume SO2: the other gases in this stream are insoluble in water. The smelter gas enters the tower at just a little bit above atmospheric pressure. The SO2 is striped from the smelter gas when it contacts water inside the tower. The water absorbs some of the SO2 but none of the other gases. The exit gas is at atmospheric pressure. For the conditions shown below, what is the mass in kg of water fed to the tower per 100 kmol of smelter gas entering? Exit gas water pso - 1.2 kN/m2 I Countercurrent Absorption Tower Smelter gas 4.5 %-by-volume SO2 Exit liquid 0.001145 kmol SO2/kmol water