Avogadro's Number Calculator
Moles to Particles
Particles to Moles
Mass to Particles
Convert mass in grams directly to number of particles
Formula
N = n × Nₐ | n = mass / molar mass | Nₐ = 6.02214076 × 10²³ mol⁻¹
Frequently Asked Questions
What is Avogadro's number?
Avogadro's number (Nₐ) is 6.02214076 × 10²³ particles per mole. It defines how many atoms, molecules, ions, or other entities are in one mole of a substance. It was redefined in 2019 as an exact number.
How do I convert moles to molecules?
Multiply moles by Avogadro's number: Number of molecules = moles × 6.022 × 10²³. For example, 2 moles of H2O contains 2 × 6.022 × 10²³ = 1.204 × 10²⁴ molecules.
How do I convert grams to molecules?
First convert grams to moles: moles = mass / molar mass. Then multiply by Avogadro's number. For example, 36.03 g of H2O = 36.03/18.015 = 2.0 mol = 1.204 × 10²⁴ molecules.
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