How many electrons make up a charge of -100 micro coulombs?

Expert Answers
justaguide eNotes educator| Certified Educator

The charge of an electron is  -1.602*10^-19 C. A micro coulomb is 10^-6 coulombs. If n electrons had the same charge as -100 micro coulombs, n*-1.602*10^-19 = -100*10^-6

=> n = -100*10^-6/-1.602*10^-19

=> n = 100*10^19/(1.602*10^6)

=> n = 62.42*10^13

The number of electrons that make up a charge of -100 micro coulombs is 62.42*10^13.