How is the jet stream related to the wind direction on the ground

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 .

well in order to answer this question you have to provide more information < 3

i would say b

explanation:

but i think i would need more information than that

a corroding iron, if that's one of your choices