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The pressure of the gas above a solution is proportional to the concentration of the gas in the solution.

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Autoionization

An ionization reaction between identical molecules.

Fossil Fuels

Substances consisting largely of hydrocarbons, derived from decay of organic materials under geological conditions of high pressure and temperature (metamorphism) include coal, petroleum, natural gas, peat and oil shale.  For further information see Fuel Chemistry

Graham's Law

The rates of effusion of gases are inversely proportional to the square roots of their molecular weights or densities.

Nuclide Symbol

Symbol for an atom A/Z E, in which E is the symbol of an element, Z is its atomic number, and A is its mass number.

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Dispersing Medium

The solvent-like phase in a colloid.

Ionic Compounds

Compounds containing predominantly ionic bonding.

Aromatic Hydrocarbons

Benzene and its derivatives.

Percentage Ionization

The percentage of the weak electrolyte that ionizes in a solution of given concentration.

Greenhouse Effect

Trapping of heat at the surface of the earth by carbon dioxide and water vapour in the atmosphere.