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A process for the industrial production of nitrogen oxide and nitric acid from ammonia and oxygen.

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Exothermicity

The release of heat by a system as a process occurs.

Metal

An element below and to the left of the stepwise division (metalloids) in the upper right corner of the periodic table, about 80% of the known elements are metals.

Homogeneous Mixture

A mixture which has uniform composition and properties throughout.

Amphoterism

The ability to react with both acids and bases.Ability of substance to act as either an acid or a base.

Phosphorus Oxychloride

Colorless to slightly yellow fuming liquid.

Mol. Wt.: 153.39
M.P.: 20C
B.P.: 105.1C
Density: 1.685 @ 15.5C
Vapor Pressure: 40 mm @ 27.3C
Vapor Density: 5.3
Used as the phosphorus source for phosphorus diffusion.

Ligand

A Lewis base in a coordination compound.

Standard Electrodes

Half-cells in which the oxidized and reduced forms of a species are present at unit activity, 1.0M solutions of dissolved ions, 1.0atm partial pressure of gases, and pure solids and liquids.

Concentration

Amount of solute per unit volume or mass of solvent or of solution.

Hydrate

A solid compound that contains a definite percentage of bound water.

Avogadro's Number

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