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

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Supercritical Fluid

A substance at temperature above its critical temperature.

Quantum Numbers

Numbers that describe the energies of electrons in atoms, derived from quantum mechanical treatment.

Conjugate Acid-base Pair

In Bronsted-Lowry terminology, a reactant and product that differ by a proton, H+.

Electrophoresis

A technique for separation of ions by rate and direction of migration in an electric field.

Homologous Series

A series of compounds in which each member differs from the next by a specific number and kind of atoms.

Voltage

Potential difference between two electrodes, a measure of the chemical potential for a redox reaction to occur.

Theoretical Yield

Maximum amount of a specified product that could be obtained from specified amounts of reactants, assuming complete consumption of limiting reactant according to only one reaction and complete recovery of product.

Supersaturated Solution

A solution that contains a higher than saturation concentration of solute, slight disturbance or seeding causes crystallization of excess solute.

Atomic Orbital

Region or volume in space in which the probability of finding electrons is highest.

Critical Temperature

The temperature above which a gas cannot be liquefied, the temperature above which a substance cannot exhibit distinct gas and liquid phases.