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The rate of a reaction 2A+B rarr A2B. ...

The rate of a reaction `2A+B rarr A_2B`.
has rate law : rate = k `[A]^2` with the rate constant equal to 0.50 `mol^(-1)" L sec"^(-1)`. Calculate the rate of reaction when
(i) [A] = 0.60 mol `L^(-1)`, [B] =-0.05 mol `L^(-1)` and
(ii) When concentration of A and B have been reduced to 1/4 th

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