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States that a system at equilibrium, or striving to attain equilibrium, responds in such a way as to counteract any stress placed upon it.
If a stress (change of conditions) is applied to a system at equilibrium, the system shifts in the direction that reduces stress.

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Nucleons

Particles comprising the nucleus, protons and neutrons.

Reducing Agent

The substance that reduces another substance and is oxidized.

Sublimation

The direct vaporization of a sold by heating without passing through the liquid state.

xylidine

Any of six isomeric compounds that have the formula C8H11N, are derivatives of xylene, and resemble aniline: used in dye manufacture.

Total Ionic Equation

Equation for a chemical reaction written to show the predominant form of all species in aqueous solution or in contact with water.

Acid Anhydride

Compound produced by dehydration of a carbonic acid. General formula is R--C--O--C--R. Chemical compound that reacts with water to form an acid and are usually oxides of nonmetallic elements.

Ion

An atom or a group of atoms that carries an electric charge.

Heteronuclear

Consisting of different elements.

Colligative Properties

Physical properties of solutions that depend upon the number but not the kind of solute particles present.

Percent Purity

The percent of a specified compound or element in an impure sample.