What is the result of adding kf to an equilibrium mixture of the weak acid hf?
hf(aq)⇔h+(aq)+f-(aq).
a. f- concentration decreases
b. the dissociation constant, k, increases
c. hf concentration decreases
d. h+ concentration decreases

the reaction mixture contains some ammonia, plus a lot of unreacted nitrogen and hydrogen. the mixture is cooled and compressed, causing the ammonia gas to condense into a liquid. the liquefied ammonia is separated and removed. the unreacted nitrogen and hydrogen are then recycled back into the reactor .

your answer would be a. 12.5 kg