A flue gas containing 4 mol% of SO2 is to be absorbed by two units of absorption tower in series. The total flowrate of the flue gas entering the first absorption tower is 60 kmol/h, whereas water as solvent is entering the first and second tower at 200 kmol/h and 150 kmol/h, respectively. Given the absorption efficiency for the first and second tower is 50% and 90%, respectively, determine the molar flowrate and mole fraction of SO2 absorbed by water for both absorption towers.

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