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` ?

Question

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 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

Monjur Alahi

7 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

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

7 views Answered 2023-02-05 15:29