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- See also changes related to Concentration, or pages that link to Concentration or to this page or whose text .
- Chemistry : The science of matter, or of the electrical or electrostatical interactions of matter.
- Engineering : The profession in which a knowledge of the mathematical and natural sciences gained by study, experience and practice is applied with judgment to develop ways to economically use the materials and forces of nature for the benefit of mankind.
- Physics : The study of forces and energies in space and time.
- Biology : The science of life — of complex, self-organizing, information-processing systems living in the past, present or future.
- Chemical engineering : The field of engineering that deals with industrial and natural processes involving the chemical, physical or biological transformation of matter or energy into forms useful for mankind, economically and safely without compromising the environment
- Environmental engineering : A field of engineering devoted to remediation of all forms of pollution.
- Air pollutant concentrations : Methods for conversion of air pollutant concentrations.
- Density (chemistry) : A measure of the mass per unit volume of a gas, liquid or solid.
- Henry's law : The relationship between the amount of gas dissolved in a liquid and the partial pressure of that gas above the liquid.
- Molarity : Chemical term for concentrations of solutions, having units of moles/liter.
- Molality : Concentration unit, moles/kilogram, useful for measuring solvent properties.
- Mole fraction : A measure of the concentration of a component substance in a mixture of substances and defined as the number of moles of a component substance in a mixture divided by the total number of moles of the mixture.
- Normality : Chemical concentration unit for acid-base reactions.
- Partial pressure : The pressure which each gas in a gas mixture would have if it alone occupied the same volume at the same temperature.
- Parts-per notation : Notation used in science and engineering, to denote dimensionless proportionalities in measured quantities such as proportions at the parts-per-million (ppm), parts-per-billion (ppb), and parts-per-trillion (ppt) level.
- Relative volatility : A measure that compares the vapor pressures of components in a liquid mixture that is widely used in designing distillation and similar separation processes.