Introduction:
Electric charge is a fundamental property of matter. It is a physical property that causes particles to experience a force when placed in an electromagnetic field. The unit of electric charge is the coulomb (C). The charge on an electron is considered as the elementary charge and is denoted by e. In this response, we will determine the number of electrons present in one coulomb of charge.

Determining the number of electrons in one coulomb:
To find the number of electrons in one coulomb of charge, we need to know the value of the elementary charge (e) and the charge in one coulomb.

- The elementary charge (e) is approximately equal to 1.602 × 10^-19 coulombs.
- One coulomb of charge is equivalent to a charge of 6.242 × 10^18 elementary charges (e).

Calculation:
To determine the number of electrons in one coulomb, we can divide the charge in one coulomb by the elementary charge.

Number of electrons = (Charge in one coulomb) / (Elementary charge)

Number of electrons = (6.242 × 10^18 e) / (1.602 × 10^-19 C)

Number of electrons ≈ 3.91 × 10^19 electrons

Therefore, there are approximately 3.91 × 10^19 electrons present in one coulomb of charge.

Summary:
- Electric charge is a fundamental property of matter.
- The unit of electric charge is the coulomb (C).
- The charge on an electron is considered as the elementary charge and is denoted by e.
- The number of electrons in one coulomb of charge is approximately 3.91 × 10^19 electrons.