2questions:

1. 4 fe(s) + 3o2(g) --> 2fe2o3(g)

in a certain reaction, 27.3 g of iron is reacted with 45.8 g of oxygen

how many grams of the excess reactant remain after the reaction is complete

2. n2 (g) + 3h2 (g) --> 2 nh3 (g)

the equation above is the equation for the haber process.

in a certain reaction, you start with 3.0 moles of nitrogen and 5.0 moles of hydrogen,. how many moles of ammonia will be produced in the reaction?