Chemistry, 17.12.2020 19:40 ashtonbillups

There are two primary isotopes found in any sample of copper: copper-63 and copper-65. The isotope 65Cu composes 69.2% of the sample and 63Cu comprises the other 30.8%.
Based on this data, what is the atomic mass of copper?

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There are two primary isotopes found in any sample of copper: copper-63 and copper-65. The isotope...