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4xx10^23tritium atoms are contained in a...

`4xx10^23`tritium atoms are contained in a vessel. The half-life of decay of trituim nuclei is 12.3 y. Find (a) the activity of the sample ,(b) the number of decays in the next 10 hours (c ) the number of decays in the next 6.15 y.

A

`1.2xx10^(14)`

B

`1.2xx10^(18)`

C

`1.2xx10^(23)`

D

`1.2xx10^(30)`

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A
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