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Voltaic cells in which the reactants (usually gases) are supplied continuously.
A voltaic cell that converts the chemical energy of a fuel and an oxidizing agent directly into electriacl energy on a continuous basis.

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Aryl Group

Group of atoms remaining after a hydrogen atom is removed from the aromatic system.

Ore

A natural deposit containing a mineral of an element to be extracted.

Fractional Distillation

The process in which a fractioning column is used in distillation apparatus to separate components of a liquid mixture that have different boiling points.

Reversible Reaction

Reactions that do not go to completion and occur in both the forward and reverse direction.

xenon hexafluoride

A colorless, crystalline compound, XeF6, that melts at 50°C to a yellow liquid, and boils at 75°C.

Salicylaldehyde

An oily, slightly water-soluble liquid, C7H6O2, having an almondlike odor: used chiefly in perfumery and in the synthesis of coumarin.

Reducing Agent

The substance that reduces another substance and is oxidized.

Alpha (a) Particle

Helium ion with 2+ charge, an assembly of two protons and two neutrons.

Electrolytic Conduction

Conduction of electrical current by ions through a solution or pure liquid.

Chemical Kinetics

The study of rates and mechanisms of chemical reactions and of the factors on which they depend.