22.5-1. amount of absorption in a tray tower. an existing tower contains the equivalent of 3.0 theoretical trays and is being used to absorb so2 from air by pure water at 293 k and 1.013 × 10 5pa. the entering gas contains 20 mol % so2 and the inlet air flow rate is 150 kg inert air/h · m 2. the entering water rate is 6000 kg/h · m 2. calculate the outlet composition of the gas. (hint: this is a trial-and-error solution. assume an outlet gas composition of, say, y 1 = 0.01. plot the operating line and determine the number of theoretical trays needed. if this number is not 3.0 trays, assume another value of y 1, and so on.)