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At a given temperature , the rate consta...

At a given temperature , the rate constant for the reaction `ArarrB " is" 2.8xx10^(-3)"L.mol"^(-1).s^(-1)` . If the concentration of A is halved, what would the rate of be the reaction be ?

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The unit of the rate constant implies that the reaction is second order .So, reducing the concentration of B by half will make the rate 1/4th of its initial value.
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