`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.

Options

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

Answer

A

Explanation

`A_(0)=lambdaN_(0)=(ln 2xx4xx10^(23))/(12.3xx365xx24xx60xx60)=7xx10^(14)//s`