One gram of a radioactive substance disintegrates at the rate of `3.7 xx10^(10)` disintegrations per second. The atomic mass of

One gram of a radioactive substance disintegrates at the rate of `3.7 xx10^(10)` disintegrations per second. The atomic mass of the subsatnce is `226`. Calculate its mean life.
A. `1.2xx10^(5)s`
B. `1.39xx10^(11)s`
C. `2.1xx10^(5)s`
D. `7.194xx10^(10)s`

One gram of a radioactive substance disintegrates at the rate of `3.7 xx10^(10)` disintegrations per second. The atomic mass of the subsatnce is `226`

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