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Rate constant for a first order reaction...

Rate constant for a first order reaction is `60 s ^(-1) . ` How much time will it take to reduce the concentration of the reaction on `(1)/(10)` th of its initial value.

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`t = (2.303)/k "log" ([R]_0)/([R])`
`t= (2.303)/(60) "log " 10`
`= 3.8 xx 10^(-2) sec`
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