[jdbaby91]

If 23.2 grams of nitrogen and 5.0 grams of hydrogen combine to form ammonia, how many grams of ammonia must form?

[kingchemist]

If they combine together, the mass made will be the sum of the two masses = 28.2g

As a check (and using simple atomic masses)
N2   +   3H2    -----> 2NH3
1 mol    3 mol            2 mol
28g       6g               34g
23.2g   4.97g             28.17 g
hey