The Half-Life of ²²²Rn Is 3

question 74

Multiple Choice

The half-life of ²²²Rn is 3.80 days. If a sample contains 36.0 g of Rn-222, how many years will it take for the sample to be reduced to 1.00 mg of Rn-222?

• A)19.7
• B)0.1597
• C)8.53
• D)0.0234
• E)none of the above

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