1. ## metal sphere

A metal sphere has a charge of +8.02uC. What is the net charge after 6.19E+13 electrons have been placed on it?

I have tried this numerous times and nothing I get ever works...

A single electron carries a charge of $-1.6 \times 10^{-19}~C$. So $6.19 \times 10^{13}$ electrons carries a charge of what?