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The half-life of K^40 is 1.30xx10^9 y. A...

The half-life of `K^40` is `1.30xx10^9` y. A sample if `1.00g` of pure `KCI` gives 160 counts `s^(-1)`.Calculate the relative abundance of `K^40`(fraction of `K^40`present ) in natural potassium .

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