Chapter 6, Problem 5PP

Consider the combination reaction of nitrogen gas with hydrogen gas to form ammonia gas:

${\text{N}}_{\text{2}}\text{(}g{\text{)+3H}}_{\text{2}}\text{(}g\text{)}\to {\text{2NH}}_{\text{3}}\text{(}g\text{)}$

The molecular diagram shows the number of ${\text{N}}_{\text{2}}{\text{ and H}}_{\text{2}}$ molecules mixed together before the reaction occurs.

(a) Identify the limiting reactant, assuming the reaction goes to completion.

(b) Draw the "after" picture. Include the correct number of product molecules and any leftover reactant molecules.

(c) Determine the reactant that is in excess.