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Definition of Formula Mass

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Formula mass is the sum of the atomic weights of atoms in a molecule.

Formula mass is the sum of the atomic weights of atoms in a molecule.

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Formula Mass Definition: The formula mass of a molecule is the sum of the atomic weights of the atoms in the empirical formula of the compound.

Also Known As: formula weight

Examples: The molecular formula for glucose is C6H12O6, so the empirical formula is CH2O.

The formula mass of glucose is (12)+2(1)+16 = 30 amu.

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