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October 1, 2014

Homework Help: Chemistry

Posted by David on Tuesday, December 11, 2012 at 11:25pm.

If the half-life of uranium-235 is 7.04 (times) 10 (to the eight power) 8 y and 12.5 g of uranium-235 remain after 2.82 (times) 10 (to the ninth power) y, how much of the radioactive isotope was in the original sample?

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