Wednesday
October 1, 2014

Homework Help: Chemistry

Posted by tina on Thursday, February 23, 2012 at 2:44pm.

If 30% of a sample of radioactive isotope decays in 24 hrs, what is the half-life?

How do i know which order to use? and do I convert hr to mins or seconds?

Pls help for my exam tomorrrow

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