The gases coming out of a reactor contain 25% ammonia and 75% inert substance. The gas flow rate pressed into the absorption tower is 1000kmol/h. The operation takes place at 30C and 1atm. The liquid used in the column contains 0.005mol of ammonia at the entrance. It is desired to reduce the ammonia concentration at the exit of the gas stream to 2%. What should be the minimum liquid flow? Draw the operating curve using Balance data of the system under transaction conditions