n. the strength of a solution, expressed as the weight of dissolved substance in grams per litre divided by its molecular weight, i.e. the number of moles per litre. Molarity is indicated as 0.1 M, 1 M, 2 M, etc.
a solution in which the number of grams of dissolved substance per litre equals its molecular weight, i.e. a solution of molarity 1 M.
mole1 n. the *SI unit of amount of substance, equal to the amount of substance that contains as many elementary units as there are atoms in 0.012 kilograms of carbon-12. The elementary units, which must be specified, may be atoms, molecules, ions, electrons, etc., or a specified group of such entities. One mole of a compound has a mass equal to its molecular weight expressed in grams. Symbol: mol.
mole2 n. a nonmalignant collection of pigmented cells in the skin. Moles are rare in infancy, increase in numbers during childhood and especially in adolescence, but decline in numbers in old age. They vary widely in appearance, being flat or raised, smooth or hairy. Changes in the shape, colour, etc., of moles in adult life should be investigated as this may be an early sign of malignant *melanoma. Medical name: pigmented naevus. See also atypical mole syndrome.... molar solution
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