posted by Laur .
N2 + 3H2 --> 2NH3
how many grams of ammonia are made if you have 15.00 g of both N2 and H2 present?
Well, you have to figure the amount of moles of each you have.
so you have molN2=.538
and you must have three times that H3, or 1.61 moles. Well, you have too much H2, so all doesn't react.
moles ammonia you get is then 2*.538, convert that to grams.