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Tattvamasi · Answer 1 · 2019-04-10T21:18:13+0000

Let's calculate the total charge of
$N=6.0 \cdot 10^(13)$ electrons. Each electron has a charge of
$e=-1.6 \cdot 10^(-19)C$ , so the total charge is

$Q_e=Ne=(6.0 \cdot 10^(13))(-1.6 \cdot 10^(-19)C)=-9.6 \cdot 10^(-6)C$

The initial charge of the sphere was

$Q_i = +8.0 mC=8.0 \cdot 10^(-3)C$
Therefore, the final net charge will be

$Q_f = Q_i + Q_e = 8.0\cdot 10^(-3)C-9.6 \cdot 10^(-6)C=+7.99 \cdot 10^(-3)C$

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