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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.