Understanding the Mole Concept

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Mole Concept

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A method to quantify atoms, molecules, or ions in a substance.

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Avogadro's Number

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6.022 × 10^{23} particles/mol

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Molar Mass

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Mass of 1 mole of a substance (g/mol)

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1 Mole of Gas at STP

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Occupies 22.4 L

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Empirical Formula

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Simplest whole-number ratio of atoms in a compound

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Molecular Formula

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Actual number of atoms of each element in a molecule

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Conversion: Moles to Particles

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Multiply by Avogadro's number

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Conversion: Particles to Moles

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Divide by Avogadro's number

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Molar Volume

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Volume occupied by 1 mole of a gas at a given temperature and pressure

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Percent Composition

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Mass percentage of each element in a compound