Determining Molecular Formula

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Determining Molecular Formula 2017-12-16T10:07:15+00:00

Molecular Formulas
Molecular formulas give the kind and number of atoms of each element present in a molecular compound. In many cases, the molecular formula is the same as the empirical formula.

Empirical formulas can be determined from the percent composition of a compound. In order to determine its molecular formula, it is necessary to know the molar mass of the compound. Chemists use an instrument called a mass spectrometer to determine the molar mass of compounds.

A procedure is described that allows the calculation of the exact molecular formula for a compound.

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