Copper has two naturally occurring isotopes: Cu-63 with a mass of 62.9291 amu and a natural abundance
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Copper has two naturally occurring isotopes: Cu-63 with a mass of 62.9291 amu and a natural abundance of 69.17%, and Cu-65 with a mass of 64.9278 amu and a natural abundance of 30.83%. Calculate the atomic mass of copper.
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