a copper sphere of mass 2 g contains abo...

a copper sphere of mass 2 g contains about `2xx10^22` atoms. The charge on the nucleus of each atom is 29e. What fraction of the electrons must be removed from the sphere to give it a charge of `+2muC`?

`1.08xx10^-11`

`2.16xx10^-11`

`3.24xx10^-11`

`4.32xx10^-11`

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