A metallic plate holds a charge of $Q=25nC.$

Does the plate have excess or lack of electrons?

What total number of elementary charges does Q represent?

The number of elementary charges, $N=$

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After $39\mathrm{.}4{10}^{10}$ electrons were added to the plate, what is the new net charge on the plate?

The new charge of the plate, $Q_{\text{n}\text{e}\text{w}}=$

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