Stripping ammonia from air into water (backhurst ex. 2-2 modified) it is desired to produce 100 kg of a solution of ammonia in wate rcontaining 10% by mass of ammonia. this will be achived by stripping ammonia from an ammonium-air mixture by water in a counter-current absorption tower. the inlet gas stream contains 20% ammonia by mass and the outlet gas 2% ammonia by mass. assume that air and water do not mix during the process. a) draw a process diagram. b) determine dof c) calculate the mass of ammonia-air which should be fed to the column.