## The Mole Concept ## 1 mole = 6.02 x 10²³ particles

A mole of any substance contains a fixed and very large number of particles, known as Avogadro’s constant. Avogadro’s constant is approximately equal to 6.02 x 1023 particles, which can be tiny particles such as atoms or molecules.

## Molar mass = mass of 1 mole of a substance

Molar mass is a measure of the mass of one mole of a substance and is typically expressed in grams per mole (g/mol)

Molar mass

## Moles = Mass / Molar Mass

To find the number of moles of a substance, simply divide the mass (g) by the molar mass (g/mol) to find the number of moles.

Moles calculation

## 1 mole = number of atoms in 12 g of carbon

Scientists picked a special type of carbon and said that if you have 12 grams of it, you have about 602,200,000,000,000,000,000,000 carbon atoms! This idea helps scientists measure how heavy atoms are and count them easily.

Mole vs Carbon relationship

## Mole-to-Mole Ratio

A mole-to-mole ratio, often simply called a mole ratio, is an idea that relates the number of moles of one substance to the number of moles of another substance in a chemical reaction.