1. Absorption of Ammonia in a Packed Tower. A gas stream contains 4.0 mol % NH3 and its ammonia content is reduced to 0.5 mol % in a packed absorption tower at 293 K and 1.013 105 Pa. The inlet pure-water flow is 68.0 kg mol/h and the total inlet gas flow is 57.8 kg mol/h. The tower diameter is 0.747 m. The film mass-transfer coefficients are k'ya = 0.0739 kg mol/s. m3.mol frac and kxa = 0.169 mol/s . m3 mol frac. Using the design methods for dilute gas mixtures, calculate the tower height using kxa. = =