A sphere is charged with electrons to

-9 * 10-6 C.

How many electrons make up this charge?

The elemental charge is 1.6 * 10-19 C.

A sphere is charged with electrons to - 9 * 10-6 C. The value given is the total charge of all the electrons present in the sphere. To calculate the number of electrons in the sphere, we divide the the total charge with the charge of one electron.

N = 9 * 10-6 C / 1.6 * 10-19 C

N = 5.6 x 10^13