Moles and Molar Mass

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6 Terms

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Mole (mol)

Unit for amount of substance; 1 mole = 6.022 × 10²³ particles (Avogadro’s number)

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Molar mass

Mass of 1 mole of a substance (g/mol); numerically equal to atomic/molecular weight

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Empirical formula

Simplest whole-number ratio of atoms in a compound

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Molecular formula

Actual number of atoms in a molecule

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Formula for moles

Moles = mass / molar mass (n = m / M)

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Formula for number of particles

Number of particles = moles × Avogadro’s number (N = n × 6.022×10²³)