relative molecular mass (redirected from relative molecular masses)

relative molecular mass

n

(Chemistry) the sum of all the relative atomic masses of the atoms in a molecule; the ratio of the average mass per molecule of a specified isotopic composition of a substance to one-twelfth the mass of an atom of carbon-12. Symbol M_r Abbreviation r.m.m Former name molecular weight

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relative molecular mass

See molecular weight.

Thesaurus

Noun

1.

relative molecular mass - (chemistry) the sum of the relative atomic masses of the constituent atoms of a molecule molecular weight mass - the property of a body that causes it to have weight in a gravitational field chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions