2 mol NO = 2 mol NH3
5 mol H2 = 2 mol NH3 → smaller ratio
Consider the following reaction: 2 NO(g) + 5 H2(g) → 2 NH3(g) + 2 H2O(g). A reaction mixture initially contains 5 moles of NO and 10 moles of H2. Without doing any calculations, determine which of the following best represents the mixture after the reactants have reacted as completely as possible.
a. 1 mol NO, 0 mol H2, 4 mol NH3, 4 mol H2O
b. 0 mol NO, 1 mol H2, 5 mol NH3, 5 mol H2O
c. 3 mol NO, 5 mol H2, 2 mol NH3, 2 mol H2O
d. 0 mol NO, 0 mol H2, 4 mol NH3, 4 mol H2O
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What scientific concept do you need to know in order to solve this problem?
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