1. The problem statement, all variables and given/known data A metal sphere has a charge of +7.0 µC. What is the net charge after 8.00 10^13 electrons have been placed on it? in µC 2. Relevant equations 3. The attempt at a solution I believe that the charge of an electron is: -1.6 x 10^-19 C and there are 8 electrons, so -1.6 x 10^19 C * 8.00 x 10 ^13 electrons right? then I add it to 7 uC? well i'm having trouble with the sigfigs, I got 5.72 uC I don't believe that is correct. please help.