Copper has two naturally occurring isotopes. copper-63, with an atomic mass of 62.94 u, makes up 69.17 percent of the sample, and copper-65, with an atomic mass of 64.93 u, makes up the other 30.83 percent. calculate the weighted average atomic mass of copper based on the given information. give your answer in a total of four significant figures
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Copper has two naturally occurring isotopes. copper-63, with an atomic mass of 62.94 u, makes up 69....
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