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A large molecule consisting of chains or rings of linked monomer units, usually characterized by high melting and boiling points.

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xylan

The pentosan occurring in woody tissue that hydrolyzes to xylose: used as a source of furfural.

Alloying

Mixing of metal with other substances (usually other metals) to modify its properties.

Use of diamonds

Diamond is a crystalline modification of pure carbon formed in the deep interior of the Earth, in the upper mantle at depths of more than 80-100 kilometers, at exceptionally high pressure and temperature. It is the most precious stone, the hardest and most wear-resistant mineral, the most brilliant and timeless gem.

Joule

A unit of energy in the SI system. One joule is 1 kg. m2/s2 which is also 0.2390 calorie.

Effective Molality

The sum of the molalities of all solute particles in a solution.

PseudobinaryIonic Compounds

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

Aromatic Hydrocarbons

Benzene and its derivatives.

Coordination Number

In describing crystals, the number of nearest neighbours of an atom or ion. The number of donor atoms coordinated to a metal.

Electromotive Series

The relative order of tendencies for elements and their simple ions to act as oxidizing or reducing agents, also called the activity series.

Salt Bridge

A U-shaped tube containing electrolyte, which connects two half-cells of a voltaic cell.