Problem: Copper metal has two naturally occurring isotopes: copper-63 (69.15%; isotopic mass = 62.93) and copper-65 (30.85%; isotopic mass = 64.93). Calculate the atomic weight of copper.

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Copper metal has two naturally occurring isotopes: copper-63 (69.15%; isotopic mass = 62.93) and copper-65 (30.85%; isotopic mass = 64.93). Calculate the atomic weight of copper.

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Based on our data, we think this problem is relevant for Professor Carlson's class at UWM.