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A copper sphere of mass 2.0 g contains a...

A copper sphere of mass `2.0 g` contains about `2xx10^(22)` atoms. The charge on the nucleus of each atom is `29 e (e= "electron charge")`. The mass of an electrion is `9.11xx10^(-31) kg`. How much mass will the sphere loss or gain if it is given a charge of `+2 muC`?

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