Question

When 10g of hydrogen gas is combined with 26g of nitrogen gas to form ammonia, what is the limiting reagent?

Answer 1

the limiting reagent is nitrogen gas.

steps:

write out balanced equation: 3H2 + N2 = 2NH3

convert to moles to find how much NH3 each yields

find molar mass of each

10 g H2 (1 mol/2.016g) (2NH3/3H2) = 3.31 mol NH3

26g N2 (1mol/28.02g)(2NH3/1N2)=1.86 mol NH3

since N2 yields less NH3, it is the limiting reagent.