1.

`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. `7xx10^(14)s^(-1)`B. `7xx10^(18)s^(-1)`C. `7xx10^(24)s^(-1)`D. `7xx10^(4)s^(-1)`

Answer» Correct Answer - A
`A_(0)=lambdaN_(0)=(ln 2xx4xx10^(23))/(12.3xx365xx24xx60xx60)=7xx10^(14)//s`


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