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Molecular weight ratio

molecular weight ratio –>
molecular weight
The sum of the atomic weight’s of all the atoms constituting a molecule; the mass of a molecule relative to the mass of a standard atom, now 12C (taken as 12.000). Relative molecular mass (Mr) is the mass relative to the dalton and has no units.
See: atomic weight.
Synonym: molecular mass, molecular weight ratio, relative molecular mass.

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