A mixture of $25\%$ ammonia gas and $75\%$ air $($on a dry basis$)$ rises $($or passes upward$)$ through a vertical scrubbing tower, to the top of which water is pumped.

The scrubbed gas exits the top of the tower containing $0\mathrm{.}5\%$ ammonia by weight, and an aqueous solution containing $10\%$ ammonia by weight exits the bottom of the tower. Both inlet and outlet gas streams are saturated with water vapor. The gas enters the tower at $37\mathrm{.}8\backslash$deg C and exits at $21\mathrm{.}1\backslash$deg C$.$ The pressure of both streams, as well as inside the tower, is $1\mathrm{.}02$ atm gauge. The air$-$ammonia mixture enters the tower at the rate of $28\mathrm{.}32$ m$3/$min$,$ as a dry gas at $15\mathrm{.}6\backslash$deg C and $1$ atm.

What percentage of the ammonia entering the tower is not absorbed by water? How many cubic meters of water per hour are pumped to the top of the tower?

Answers: $1\mathrm{.}5\%$; $2\mathrm{.}71$ m$3/$h

Please make it as detailed and explanatory as possible because I want to study and$$understand$$it$.$