How many electrons are in one coulomb?

One coulomb is the amount of electric charge that is carried by approximately 6.25 x 10^18 elementary charges, which are the charges of electrons. This relationship is derived from the fact that the charge of a single electron is about -1.6 x 10^-19 coulombs. Therefore, to find the number of electrons in one coulomb, you would divide one coulomb by the charge of a single electron.

This gives the calculation:

1 coulomb ÷ 1.6 x 10^-19 coulombs/electron = 6.25 x 10^18 electrons.

This is why the correct answer represents the total number of electrons in one coulomb of electric charge. Understanding this connection between charge and the number of electrons is fundamental in the study of electricity and electromagnetism, as it lays the groundwork for how electric charge is quantified and relates to current flow in circuits.