4-10 Determine amount of unreacted excess reactant

4-10-1. Consider the reaction: N2 + 3 H2 → 2 NH3 For a mixture of 2.00 mol N2 and 3.00 mol H2, How much of the excess reactant would remain if the limiting reactant is consumed?
A. 0.500 mol, B. 1.00 mol, C. 2.00 mol, D. 4.00 mol