Chemistry 9701 · AS & A Level · Atoms, molecules and stoichiometry

Atoms, molecules and stoichiometry — practice question

A reaction occurring inside a catalytic converter in a car exhaust system involves nitrogen oxide and octane (unburned petrol). This reaction produces non-toxic products. Which equation represents the reaction correctly?

  • A$\text{C}_8\text{H}_{16} + 16\text{NO} \rightarrow 8\text{CO} + 8\text{N}_2 + 8\text{H}_2\text{O}$
  • B$\text{C}_8\text{H}_{16} + 24\text{NO} \rightarrow 8\text{CO}_2 + 12\text{N}_2 + 8\text{H}_2\text{O}$
  • C$\text{C}_8\text{H}_{18} + 17\text{NO} \rightarrow 8\text{CO} + 8\tfrac{1}{2}\text{N}_2 + 9\text{H}_2\text{O}$
  • D$\text{C}_8\text{H}_{18} + 25\text{NO} \rightarrow 8\text{CO}_2 + 12\tfrac{1}{2}\text{N}_2 + 9\text{H}_2\text{O}$

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