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April 20, 2014

Homework Help: chemistry

Posted by amanda on Friday, October 31, 2008 at 7:07pm.

a)indium-115 has a half life of 4.5 hours. if you start with a 12.0-mg sample of indium-115, how much will remain after 13.5 hours?
b)how much of a 3.50-mg smaple of nickel-63 will remain after 368 years? the half-life of nickel-63 is 92 years?

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