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30 December, 00:10

What is the rate of the reaction 4 nh3 + 5 o2 → 4 no + 6 h2o when 0.0500 mol/l of nh3 is being consumed per second? 1. 0.0125 m·sec-1 2. one of the other answers has the right number but the units are wrong. 3. - 0.0125 m·sec-1 4. 0.200 m·sec-1 5. - 0.200 m·sec-1?

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  1. 30 December, 00:39
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    The only information in this problem that we are given with are the stoichiometric coefficients in the reaction, and the rate of disappearance of NH₃ as 0.05 M/s. The rate of disappearance always has a negative sign. The general formula would be:

    Rate of Reaction = - (ΔNH₃/Δtime) (1/v), where v is the stoichiometric coefficient of NH₃ in the reaction

    Substituting the values,

    Rate of Reaction = - (0.05 M/s) (1/4) = - 0.0125 M/s
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