Answer: The element rhenium (Re) has two naturally
Chapter 3, Problem 3.33(choose chapter or problem)
The element rhenium (Re) has two naturally occurring isotopes, 185Re and 187Re, with an average atomic mass of 186.207 u. Rhenium is 62.60% 187Re, and the atomic mass of 187Re is 186.956 u. Calculate the mass of 185Re
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