........ is the sum of atomic masses of the elements present in a molecule.

Atomic mass

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Gram formula mass

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Average atomic mass

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Molecular mass

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Solution

The correct option is D Molecular mass
Molecular mass is the sum of atomic masses of the elements present in a molecule. Gram formula mass is the amount of a compound with the exact mass in grams as the formula mass in amu. The standard unit of mass that measures mass on the molecular scale or an atomic scale is "amu".

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