The exit gas from an alcohol fermenter consists of an air-C02 mixture containing 10 mol% C02 that is to be absorbed in a 5.0-N solution of triethanolamine, containing 0.04 mol of carbon dioxide per mole of amine solution. If the column operates isothermally at 25"C, if the exit liquid contains 78.4% of the C02 in the feed gas to the absorber, and if absorption is carried out in a six-theoretical plate column, calculate: a). Moles of amine solution required per mole of feed gas. (b) Exit gas composition.