A mix of 75% air and 25% NH3 gas is passed upward thru a vertical scrubbing tower, to the top of which water is pumped. Scrubbed gas which is having the 0.5% NH3 leaves the top of the tower, and an aqueous solution containing 10% NH3 by weight leave the bottom. Both entering and leaving streams are saturated with water vapor. The pressure of both streams and thru-out the tower is 1.02atm gauge. The gas enters the lower tower at 37.8oC and leaves at21.1oC. The air-NH3 mix enters the tower at a rate of 28.32m^3/min, measured as dry gas at 15.6oC and 1 atm. what percentage of NH3 entering the tower is not absorbed by water? Determine the numbers of cubic meters of water per hour are pumped to the top of the tower?