Because displacement of water is the convenient way to obtain gas.
Ammonia has a characteristic sharp, choking smell. It also makes damp red litmus paper turn blue. Ammonia forms a white smoke of ammonium chloride when hydrogen chloride gas, from concentrated hydrochloric acid, is held near it.
Appropriate units for the speed of a chemical reaction, the reaction rate, are M/s
You should give a picture of the fable!
