Question

What is a mole? What is the unit of mole? How many molecules are there in a certain mass of a substance?

Answer 1

Mole is the amount of any substance which contains Avogadro number(6.022×10²³) no of particles.
SI unit of amount of substance is mole(abbreviated mol).
In 1 mol of any substance,there is 6.022×10²³ molecules.

Answer 2

A mole is defined as the amount of substance that contains Avagadro's number of particles.

• A mole is defined as the scientific measure of measuring the mass of very small atoms and molecules.
• The unit of the mole is mol.
• 1 mole is equal to 6.022 *10²³ molecules in a certain mass of the substance.
• Examples of moles are one mole of gold, one mole of the carbon atom, etc.