3) If an object has a net negative charge of 4.0 Coulombs, the object possesses
1) 6.3 x 1018 more electrons than protons
2) 2.5 x 1019 more electrons than protons
3) 6.3 * 1018 more protons than electrons
4) 2.5 * 1019 more protons than electrons

2.5*10^19 more electrons than protons

Explanation:

1 coulomb equals 6.25*10^18 elementary charges. 4 coulombs equals 2.5*10^19 elementary charges. But because the net charge is negative, it can be inferred that there are more electrons than protons. How much more? The net charge is -4 coulombs. Therefore, there are 2.5*10^19 more electrons than protons.

this is a good question! i'll do some research and come back when i have the answer!