molecular weight(redirected from molecular weight ratio)
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The sum of the atomic weights of all the atoms in a molecule. Also called relative molecular mass.
(Chemistry) the former name for relative molecular mass
the average weight of a molecule of an element or compound measured in units based on 1/12 the weight of the carbon-12 atom; the sum of the atomic weights of all the atoms in a molecule. Abbr.: mol. wt.
The sum of the atomic weights of the atoms contained in a molecule. For example, since the atomic weight of hydrogen is 1 and the atomic weight of oxygen is 16, the molecular weight of water (H2O) is 1 + 1 + 16, or 18.
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|Noun||1.||molecular weight - (chemistry) the sum of the relative atomic masses of the constituent atoms of a molecule|
mass - the property of a body that causes it to have weight in a gravitational field