A 0.5 mole sample of argon gas occupies a volume of 500 mL at 740mm Hg pressure. At what volume will the pressure of the argon gas be 780mm Hg if the number of moles are increased to 1.2?

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 .

the answer to your question is c

answer; talc and gypsum;