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Any of three oily, colorless, water-insoluble, flammable, toxic, isomeric liquids, C8H10, of the benzene series, obtained mostly from coal tar: used chiefly in the manufacture of dyes.

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Specific Heat

The amount of heat required to raise the temperature of one gram of substance one degree Celsius.

Polyene

A compound that contains more than one double bond per molecule.

Insoluble Compound

A very slightly soluble compound.

ytterbia

Ytterbia is a colorless compound, Yb2O3, used in certain alloys and ceramics. Also known as ytterbium oxide.

Line Spectrum

An atomic emission or absorption spectrum.

Law of Conservation of Matter

There is no detectable change in the quantity of matter during an ordinary chemical reaction.

Accuracy

How closely a measured value agrees with the correct value.

Avogadro's Law

At the same temperature and pressure, equal volumes of all gases contain the same number of molecules.

Avogadro's Number

The number (6.022x10^23) of atoms, molecules or particles found in exactly 1 mole of substance.

Heat of Crystallization

The amount of heat that must be removed from one gram of a liquid at its freezing point to freeze it with no change in temperature.