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Covalent bond in which electron density is symmetrically distributed.

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Endothermic

Describes processes that absorb heat energy.

Acidic Salt

A salt containing an ionizable hydrogen atom. Acidic salt does not necessarily produce acidic solutions.

xylic acid

Any of six colorless, crystalline, isomeric acids having the formula C9H10O2, derived from xylene.

Hydrolysis

The reaction of a substance with water or its ions.

Hydrometer

A device used to measure the densities of liquids and solutions.

Heat of Vaporization

The amount of heat required to vaporize one gram of a liquid at its boiling point with no change in temperature. Usually expressed in J/g. The molar heat of vaporization is the amount of heat required to vaporize one mole of liquid at its boiling point with no change in temperature and usually expressed ion kJ/mol.

Barometer

A device for measuring pressure.

Saponification

Hydrolysis of esters in the presence of strong soluable bases.

xenon

A heavy, colorless, chemically inactive, monatomic gaseous element used for filling radio, television, and luminescent tubes. Symbol: Xe, at. wt.: 131.30, at. no.: 54.

Hydrophilic Colloids

Colloidal particles that repel water molecules.