Question

How much phosphorus-32 remains from a 6.00 g sample after each of the following number of half- lives: (a) 3; (b) 10? g of ph
If a radioactive sample had an activity of 2.2 mCi, how many disintegrations per second does this correspond to? * 10 disinte
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Answer #1

2 h 210 9 Sy oog - 5.895x10 1 a 3 74100 decys per second . 2.2 mci - 2.2 x 3 7x10 x 103 decy, ps. 2 8. 198107 decay per sec

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