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The degree of polymerization, the average number of monomer units per polymer unit.

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Autoionization

An ionization reaction between identical molecules.

Ionization

In aqueous solution, the process in which a molecular compound reacts with water and forms ions.

Line Spectrum

An atomic emission or absorption spectrum.

Composition Stoichiometry

Descibes the quantitative (mass) relationships among elements in compounds.

van der Waals' Equation

An equation of state that extends the ideal gas law to real gases by inclusion of two empirically determined parameters, which are different for different gases.

Standard Molar Volume

The volume occupied by one mole of an ideal gas under standard conditions, 22.4liters.

Barometer

A device for measuring pressure.

Law of Combining Volumes (Gay-Lussac's Law)

At constant temperature and pressure, the volumes of reacting gases (and any gaseous products) can be expressed as ratios of small whole numbers.

 

PseudobinaryIonic Compounds

Compounds that contain more than two elements but are named like binary compounds.

Spectral Line

Any of a number of lines corresponding to definite wavelengths of an atomic emission or absorption spectrum, represents the energy difference between two energy levels.