This problem determines the number of individual electrons in a 100-micro-coulomb total charge. The underlying idea is that each electron carries a fixed, tiny standard charge equal to $1.6 times 10-19 text Coulombs. Explanation: To find the total number of electrons, you divide the total charge by the charge of a single electron.Result: Dividing 100 micro-coulombs by the charge of one electron gives approximately $6.25 times 10^{14}$ electrons (625 trillion electrons). This problem determin...