Q 1145291163.     A first-order reaction has a rate constant of 0.0051 `(min)^-1`. If we begin with `0.10` M concentration of the reactant, what concentration of reactant will remain in the solution after `3` hours?

A

`0.0398` M

B

`0.0438` M

C

`0.0291` M

D

None of these

HINT

Use `log((A_0)/A)=(kt)/2.303`

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