Calculate the charge on one mole of neutrons.

Mass of one electron is $9.10\times {10}^{-31} \mathrm{kg}$. Mass of one mole of electron is:

$9.10\times {10}^{-31} \mathrm{kg}\times 6.023\times {10}^{23}=5.486\times {10}^{-7} \mathrm{kg}$

Mass of one electron is $1.602\times {10}^{-19} \mathrm{Coulomb}$. Charge of one mole of electron is:

$1.602\times {10}^{-19}\times 6.023\times {10}^{23}=9.647\times {10}^{4 }\mathrm{Coulomb}$