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A naturally occuring sample of copper consists of 69.2% of Cu63 and 30.8% of Cu65.The relative atomic mass of Cu63 is 62.93 and that of Cu65 is 64.93.Find the atomic mass of a naturally occuring sample of copper.
9 years ago

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DrBob222
(0.692*mass) + (0.308*mass) = ?
9 years ago

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