Explain mole concept.

Hint- In order to deal with this question first we understand the term mole then we will proceed further by definition of mole concept and by taking an example we will try to clear the given term

Complete answer:
Mole: A mole is defined as the amount of a substance that contains exactly $6.02214046 \times {10^{23}}$ ‘elementary entities’ of the given substance. The number $6.02214046 \times {10^{23}}$ is popularly known as the Avogadro constant and is often denoted by the symbol ${N_A}$ . The elementary entities that can be represented in moles can be atoms, molecules, monatomic/polyatomic ions, and other particles (such as electrons).
The definition of mole is a simple way to describe the quantity of a substance. Any metric can be divided into two parts-the numerical magnitude and the units expressed in the magnitude. For example, when the mass of a ball is measured to be 2 kilograms, the magnitude is ‘2’ and the unit is ‘kilogram’.
Just one gram of a pure product is considered to contain an enormous number of atoms when interacting with particles at an atomic (or molecular) level. That is where the definition of the mole is popularly used. It focuses mainly on the unit known as a 'mole,' which is a collection of very large particles.

Note- The number $6.02214046 \times {10^{23}}$ has a lot of decimal places and is difficult to remember so most of the time for the sake of simplicity it is taken as $6.022 \times {10^{23}}$ or $6.023 \times {10^{23}}$ as mentioned in the problem. Students must remember the value of Avagadro’s number for solving the problems related to mole concept. It is used in finding molar mass, molarity, molality and normality as well.