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April 21, 2014

Homework Help: College Chemistry

Posted by Jude on Thursday, May 5, 2011 at 9:32pm.

How much time in years (assume a 365 day yr) would it take for a 1.6678g sample of 239Np to decay to a mass of 0.8671g if it has a half life of 2.030*10^5s

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