Adding up all of the of all of the individual atoms within or
of all of the individual atoms within one molecule of a
compound will determine the molecular mass of the compound.
OA) electrons
OB) atomic numbers
OC) atomic masses
OD) protons

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 .

i'm pretty sure its b i might be wrong though!