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J. W. Hill, R. H. Petrucci, T. W. McCreary, & S. S. Perry General Chemistry, 4th edition.

Review Question 13.2

Explain why the rate of disappearance of NO and the rate of formation of N2 are not the same in the reaction,
2CO(g) + 2NO(g) 2CO2(g) + N2(g).


Because of the 2:1 stoichiometric ratio between NO and N2, the NO must use 2 moles for each mole of N2 produced. This means that the rate of consumption of NO is twice as fast as the rate of production of N2.