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By Anne Marie Helmenstine, Ph.D.
A molecular formula describes the number and type of atoms in a molecule.
Molecular Formula Definition: An expression which states the number and type of atoms present in a molecule of a substance.
Examples: There are 6 C atoms and 14 H atoms in a hexane molecule, which has a molecular formula of C6H14.
Anne Marie Helmenstine, Ph.D.
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