whose mean life is 10^9 s. The mass of an atom of this radioisotopes is 10^-25 kg. The mass (in mg) of the radioactive sample is

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The activity of a freshly prepared radioactive sample is 10^10 disintegrations per second, whose mean life is 10^9 s. The mass of an atom of this radioisotopes is 10^-25 kg. The mass (in mg) of the radioactive sample is
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Sep
The activity of a freshly prepared radioactive sample is 10^10 disintegrations per second, whose mean life is 10^9 s. The mass of an atom of this radioisotopes is 10^-25 kg. The mass (in mg) of the radioactive sample is The activity of a freshly prepared radioactive sample is 10^10 disintegrations per second whose mean life [...]
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