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The half-life of U^(238) against alpha-d...

The half-life of `U^(238)` against `alpha-`decay is `1.42xx10^(17)s`. How many disintegrations per second occur in 1 g of `U^(238)`? Take Avogardo number `=6.02xx10^(23)"mol"^(-1)`?

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The correct Answer is:
`1.235xx10^(4)S^(-1)`
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