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noun, Chemistry.
a chemical formula that indicates the kinds of atoms and the number of each kind in a molecule of a compound.
a chemical formula indicating the numbers and types of atoms in a molecule: H2SO4 is the molecular formula of sulphuric acid Compare empirical formula, structural formula

molecular formula n.
A chemical formula that shows the number and kinds of atoms in a molecule.
molecular formula
A chemical formula that shows the total number and kinds of atoms in a molecule, but not their structural arrangement. For example, the molecular formula of aspirin is C9H8O4. Compare empirical formula, structural formula.


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