physics
posted by Ann .
The final charge on each of the three separated spheres in part (c) is +3.0 µC. How many electrons would have to be added to one of the three spheres to make it electrically neutral?
Divide 3*10^6 Coulombs by 1.6*10^19 Coulombs per electron. The will be the number of electrons needed per sphere

1.875x10^13