What is the unit that is equivalent to 6.25 x 10^18 electrons?

The unit that equates to 6.25 x 10^18 electrons is the Coulomb. One Coulomb is defined as the amount of electric charge that is carried by a constant current of one ampere in one second. Mathematically, one Coulomb is equivalent to approximately 6.25 x 10^18 elementary charges, which are the charges of individual electrons. This direct relationship demonstrates how electric charge is quantified in terms of the number of electrons, making the Coulomb the correct answer.

In contrast, Joules are a unit of energy, Ohms measure electrical resistance, and Volts represent electric potential difference. While these units are all fundamental to understanding electrical systems, they do not pertain directly to the quantity of electrons as the Coulomb does. Thus, recognizing the specific definitions and relationships associated with each unit is essential for comprehending the concepts of electrical charge and units.