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A first order reaction taken 45.4 minute...

A first order reaction taken 45.4 minutes for 50% completion. How much time will it take for 60% completion ?

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`k = (2.303)/(t) "log" ([R]_0)/([R])`
`k = "log" (100)/50`
`k = (2.303 xx 0.301)/(45.4)`
`= 0.0153`
`t = (2.303)/(0.0163) "log" 100/40`
`= 60 `min
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