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Find the quantity of polonium .(80)^(210...

Find the quantity of polonium `._(80)^(210)Po` whose activity is `3.7xx10^(10)` dps. Find also the number of atoms of polonium disintegrated during its mean life. (Half life of polonium is 138 days)

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The correct Answer is:
`[0.22 mg, 4.03xx10^(17)]`
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