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Mole Calculator

Calculate amount of substance (n), mass (m), or molar mass (M) using n = m / M. Particle count is also calculated via Avogadro's constant.

Formulas

n = m / M

N = n × Nₐ

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g
g/mol
mol

The mole calculator computes the relationship between amount of substance (n), mass (m), and molar mass (M) using the formula n = m / M. Additionally, the particle count (N) is calculated via N = n × Nₐ, where Nₐ = 6.022 × 10²³ mol⁻¹ is Avogadro's constant.

The amount of substance in moles is one of the seven SI base units and indicates how many particles (atoms, molecules, ions) of a substance are present. One mole contains exactly 6.02214076 × 10²³ particles.

The calculator is used in chemistry for stoichiometric calculations, converting between mass and amount of substance, and determining particle count. It is a fundamental tool for studies and laboratory work.

Frequently Asked Questions

What is amount of substance and what does "mole" mean?
The amount of substance (symbol: n) is an SI base unit that indicates the number of particles of a substance. The unit mole (mol) is defined such that 1 mole contains exactly 6.02214076 × 10²³ particles (Avogadro's constant).
How do I convert grams to moles?
The conversion uses n = m / M, where n is the amount of substance in moles, m is the mass in grams, and M is the molar mass in g/mol. Example: 10 g of water (M = 18.015 g/mol) equals 10 / 18.015 = 0.555 mol.
What is Avogadro's constant?
Avogadro's constant Nₐ = 6.02214076 × 10²³ mol⁻¹ indicates the number of particles in one mole. It connects the microscopic world (individual atoms/molecules) with the macroscopic world (measurable quantities). Since 2019, it is exactly defined.

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