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Foundations of Chemistry

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Foundations of Chemistry

Matter

Anything that occupies space and possesses rest mass, existing in the solid, liquid, gas or plasma state.

kg Foundations of Chemistry

Mixture

A physical combination of two or more substances that keep their own chemical identities and can be present in any proportion.

Dimensionless Foundations of Chemistry

Molar Mass

The mass of one mole of a substance, numerically equal to its relative atomic or molecular mass expressed in grams.

M = m / n g/mol Foundations of Chemistry

Molar Volume

The volume occupied by one mole of a substance under stated conditions of temperature and pressure.

V_m = V / n = RT / p L/mol Foundations of Chemistry

Mole

The SI base unit for amount of substance, containing exactly 6.02214076 × 10²³ elementary entities.

n = m / M mol Foundations of Chemistry

Molecular Formula

The formula stating the actual number of atoms of each element present in one molecule of a compound.

molecular formula = n × empirical formula Dimensionless Foundations of Chemistry

Molecular Mass

The sum of the relative atomic masses of all atoms shown in a molecular formula.

M_r = Σ A_r (all atoms) Dimensionless Foundations of Chemistry

Molecule

An electrically neutral group of two or more atoms held together by covalent bonds, acting as the smallest unit of a covalent substance.

Dimensionless