the average weight of a molecule of an element or compound measured in units once based on the weight of one hydrogen atom taken as the standard or on 1/16 (0.0625) the weight of an oxygen atom, but after 1961 based on 1/12 (0.083) the weight of the carbon-12 atom; the sum of the atomic weights of all the atoms in a molecule.
Abbreviation: mol. wt.
the former name for relative molecular mass
molecular weight n.
Abbr. mol wt, MW
The sum of the atomic weights of all the atoms in a molecule. Also called formula weight.
The sum of the atomic weights of the atoms contained in a molecule. Also called relative molecular mass.
molecular weight [(muh-lek-yuh-luhr)]
The sum of the atomic weights of all the atoms in a molecule.
[mol-uh-kyool] /ˈmɒl əˌkyul/ noun 1. Chemistry, Physics. the smallest physical unit of an element or compound, consisting of one or more like atoms in an element and two or more different atoms in a compound. 2. Chemistry. a quantity of a substance, the weight of which, measured in any chosen unit, is numerically equal to […]
- Mole drain
noun 1. an underground cylindrical drainage channel cut by a special plough to drain heavy agricultural soil
noun, Chemistry. 1. the ratio of the number of moles of a given component of a mixture to the total number of moles of all the components. mole fraction n. The ratio of the moles of one component of a system to the total moles of all components present.
[mohl-hil] /ˈmoʊlˌhɪl/ noun 1. a small mound or ridge of earth raised up by a or burrowing under the ground. Idioms 2. make a mountain out of a molehill, to exaggerate a minor difficulty. /ˈməʊlˌhɪl/ noun 1. the small mound of earth thrown up by a burrowing mole 2. make a mountain out of a […]