Cu-63 isotope is 69.09% and Cu-65, 30.91% in a copper atom. If the mass of ${ }^{63} Cu$ isotope is 62.9298 amu, what must be the mass of ${ }^{63} Cu$ isotope given that atomic mass of copper is 63.546 amu?

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Cu-63 isotope is 69.09% and Cu-65, 30.91% in a copper atom. If the mass of ${ }^{63} Cu$ isotope is 62.9298 amu, what must be the mass of ${ }^{63} Cu$ isotope given that atomic mass of copper is 63.546 amu?

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