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A first order reaction has a rate consta...

A first order reaction has a rate constant of `15 xx 10^(-3) s^(-1)`. How long will `5.0 g` of this reaction take to reduce to `3.0 g` ?

Text Solution

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Applying first order kinetic equation,
`t = (2.303)/(k) log.(a)/((a-x))`
`k = 5 xx 10^(-3) s^(-1), a = 5 g, (a-x) = 3 g`
`t = (2.303)/(5 xx 10^(-3)) log.(5)/(3) = 34.07 s`
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