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18 May, 00:37

A zero-order reaction has a constant rate of 4.40*10-4 m/s. if after 45.0 seconds the concentration has dropped to 1.50*10-2 m, what was the initial concentration? express your answer with the appropriate units.

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  1. 18 May, 00:49
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    The zero order means that the rate does not depend on concentration. Therefore the rate is constant even if the concentration changes. For each second it goes by 4.40 x 10^-4 is consumed

    what about 45 second

    =45 s x (4.4 x10^-4m/s) = 0.0198m

    The total initial is therefore = 0.0198 + (1.50 x10^-2) = 0.0348m
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