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    This was a question from a past paper, no judging I'm pretty bad with factors haha so if somebody could please explain why the answer is 27 and not 3 I'd appreciate it .
    "This reaction is first order with respect to hydrogen and second order with respect to nitrogen (II) oxide:
    2H2 (g) + 2NO2 (g) ------------> 2H2O (g) + N2 (g)

    By what factor will the initial rate increase if the concentration of hydrogen and nitrogen (II) oxide are both tripled?"

    The answer is 27 by the way, if someone could break it down that'd be great

    Tripling [H2] triples the rate
    Tripling [NO2] triples it squared (since it is 2nd order) i.e. 3x3 faster i.e. 9x faster
    The two effects are concurrent...

    3x9x i.e. 27x
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