(Solved): a) Calculate the number of electrons in a small, electrically neutral silver pin that has a mass o ...

a) Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of \( 12.0 \mathrm{~g} . \) Silver has 47 electrons per atom, and its molar mass is \( 107.87 \mathrm{~g} / \mathrm{mol} \). b) Imagine adding electrons to the pin until the negative charge has the very large value \( 3.00 \mathrm{mC} \). How many electrons are added for every \( 10^{9} \) electrons already present?