What is One Mole and How many Particles are in a Mole? The Mole and the Number of ParticlesOne mole is defined as the amount of substance that contains as many particles as the number of atoms in exactly 12 g of carbon-12, which is 6.02 × 1023 particles. The symbol of mole is mol. In chemistry, we use the unit ‘mole’ to represent the amount of substance containing … [Read more...] about What is One Mole and How many Particles are in a Mole?