what do you understand by the molecular mass of a substance.
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Molecular Mass Definition. Molecular mass is a number equal to the sum of the atomic masses of the atoms in amolecule. ... Molecular mass is a dimensionless quantity, but it is given the unit Dalton or atomic mass unit as a means of indicating the mass is relative to 1/12th the mass of a single atom of carbon-12.Apr 5, 2018
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