Convert between units like meters, feet, inches, yards, kilometers and miles. The calculator below can be used to convert between length units:
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.
In chemical thermodynamics, activity (symbol a) is a measure of the âeffective concentrationâ of a species in a mixture, in the sense that the species' chemical potential depends on the activity of a real solution in the same way that it would depend on concentration for an ideal solution.