Question

What is the limiting reagent when 150.0 g of nitrogen reacts with 32.1 g of hydrogen?
N2(g) + 3H(g) > 2NH3(g)

Answer 1

First, fix your equation
how many moles of each reagent do you have?
If moles(H2) is less than 3 times the moles(N2) then H is the limiting reagent.