molecular formula

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molecular formula:

see formulaformula,
in chemistry, an expression showing the chemical composition of a compound. Formulas of compounds are used in writing the equations (see chemical equations) that represent chemical reactions. Compounds are combinations in fixed proportions of the chemical elements.
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molecular formula

[mə′lek·yə·lər ′fȯr·myə·lə]
(chemistry)
A chemical formula that indicates the actual numbers and kinds of atoms in a molecule, but not the chemical structure.

molecular formula

a chemical formula indicating the numbers and types of atoms in a molecule