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A first order reaction has a rate consta...

A first order reaction has a rate constant of `5 xx 10^(-3) s^(-1)`. How long will `5.0 g` of this reaction take to reduce to `3.0 g` ?

A

34.07 s

B

7.57 s

C

10.10 s

D

15 g

Text Solution

Verified by Experts

The correct Answer is:
A
`t = (2.303)/(k) "log" (a)/((a - x))`
or `t = (2.303)/(15 xx 10^(-3)) "log" (5)/(3) = 34.07s`
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