Science
Mole concept.
Definition
The mole is the SI unit for measuring the amount of a substance. One mole contains exactly 6.022 × 10²³ particles (Avogadro's number) and equals the substance's molar mass in grams. It bridges the gap between the atomic scale and measurable laboratory quantities.
Examples
Real-world.
- 1 One mole of carbon-12 has a mass of exactly 12 grams
- 2 One mole of water (18.02 g) contains 6.022 × 10²³ water molecules
- 3 Using moles to convert between grams and number of atoms in a sample
Key Fact
1 mole = 6.022 × 10²³ particles (Avogadro's number).