Avogadro's Number
6.022 × 10²³ particles per mole
This is the number of particles (atoms, molecules, ions) in one mole of a substance.
Understanding Moles and Molecules
A mole is a unit that represents 6.022 × 10²³ particles of any substance. This number, known as Avogadro's number, allows chemists to count atoms, molecules, or ions by weighing them.
Examples
1 mole of H₂O = 6.022 × 10²³ water molecules
0.5 moles = 3.011 × 10²³ molecules
2 moles = 1.204 × 10²⁴ molecules