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The radioisotope radon-222 has a half life of 3.8 days. How much of a 73.9 g sample of radon-222 would be left after approximately 23 days?

NotSoSmart  May 25, 2018
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We have

 

73.9 * ( 1/2)^ ( t / 3.8)         where t  is the number of days...so....

 

73.9 * (1/2) ^ (23/ 3.8)  ≈  1.11  g

 

 

cool cool cool

CPhill  May 25, 2018

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