A metal sphere has a charge of -6 µC. How many excess electrons are there on the sphere?

charge per electron: 1.6E-19

electrons per coulomb: 1/chargeperelectron

electrons in above charge: 6E-6*electronspercoulomb=6E-6/(1.6E-19

To determine the number of excess electrons on the sphere, you need to know the charge of a single electron and the total charge on the sphere.

The charge of a single electron is approximately -1.6 x 10^-19 coulombs (C).

Given that the metal sphere has a charge of -6 µC (-6 x 10^-6 C), we can divide this by the charge of a single electron to find the number of excess electrons:

Number of excess electrons = Total charge on the sphere / Charge of a single electron

Number of excess electrons = (-6 x 10^-6 C) / (-1.6 x 10^-19 C)

Dividing these values, we get:

Number of excess electrons = 3.75 x 10^13 electrons

Therefore, there are approximately 3.75 x 10^13 excess electrons on the sphere.