Hydrogen gas, H2, reacts with nitrogen gas, N2, to form ammonia gas, NH3, according to the equation

3H2(g)+N2(g)→2NH3(g) PArt 1: How many grams of NH3 can be produced from 3.26 mol of N2 and excess H2. Part 2:
How many grams of H2 are needed to produce 13.17 g of NH3? part 3 How many molecules (not moles) of NH3 are produced from 1.10×10−4 g of H2?