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March 27, 2015

Homework Help: Ap Chemistry

Posted by Jimmy on Tuesday, September 25, 2012 at 4:54pm.

Re has two natural occuring isotopes 185 Re and 187 Re with an average atomic mass of 186.207 amu. Re is 62.60% 187Re and the atomic mass of 187Re is 186.956 amu. What is the mass of 185 Re

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