129. when two cotton plugs, one moistened with ammonia and the other with hydrochloric acid, are simulataneously inserted into opposite ends of a glass tube 87.

129. When two cotton plugs, one moistened with ammonia and the other with hydrochloric acid, are simulataneously inserted into opposite ends of a glass tube 87.0 cm long, a white ring of NH4CI forms where gaseous NH, and gaseous HCl first come into contact. NHg)+ HCI(g)> NH,CI(s) At what distance from the ammonia-moistened plug does this occur? (a) 51.7 cm from NH, end (c) 43.5 at mid point b) 51.7 cm from HCl end (d) None of these