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In chemistry, concentration is the abundance of a constituent divided by the total volume of a mixture. Several types of mathematical description can be distinguished: mass concentration, molar concentration, number concentration, and volume concentration. The term concentration can be applied to any kind of chemical mixture, but most frequently it refers to solutes and solvents in solutions.
The number of grams of an element containing Avogadro's number of atoms. concentration. An expression of the quanitity per unit volume or unit mass of a substance. Common measures of concentration are molarity (mol/L) and molality (mol/kg). density. Mass per unit volume. formal concentration (F) The molarity of a substance if it did not change its chemical form on being dissolved.