An ammonia$-$air mixture containing $2\%$ ammonia will be scrubbed with pure water

at $20$oC and $1$ atm in a tray tower. The water flow rate is $13\mathrm{.}5$ kg$/$h$.$m$2$ and the gas

flow rate at the inlet is $13\mathrm{.}5$ kg$/$h$.$m$2.$ Assume operating line is straight.

a$)$ Calculate the theoretical number of trays required to absorb $98\%$ of the

ammonia entering the tower using the equilibrim relationship y$=0\mathrm{.}746$ x$.$

b$)$ Calculate the molar flow rates of the gas and the liquid mixtures leaving the

absorption tower. In addition, calculate the inert flow rates.