Chemistry - Moles

A mole is a large number used to count particles, specifically 6.022 x 10^23 particles.

Avogadro's number is 6.022 x 10^23, which is the number of particles in one mole of a substance.

There are 6.022 x 10^23 atoms in 12 grams of carbon-12.

3.01 x 10^23 particles.

They all have the same number of molecules.

The mass of a substance in grams is equal to the number of moles multiplied by the molar mass of the substance.

Molar mass is the mass of one mole of a substance, usually expressed in grams per mole (g/mol).

Number of moles = mass (g) / molar mass (g/mol).

Number of particles = moles x Avogadro's number (6.022 x 10^23).

It allows chemists to count particles by weighing them.