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The amount of heat absorbed in the formation of solution that contains one mole of solute, the value is positive if heat is absorbed (endothermic) and negative if heat is released (exothermic).

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Disproportionation Reactions

Redox reactions in which the oxidizing agent and the reducing agent are the same species.

Compressed Gas

A gas or mixture of gases having, in a container an absolute pressure exceeding 40 psi at 21.1°C (70°F)

Fatty Acids

An aliphatic acid, many can obtained from animal fats.

Ionization Constant

Equilibrium constant for the ionization of a weak electrolyte.

Stoichiometry

Description of the quantitative relationships among elements and compounds as they undergo chemical changes.

Dermal toxicity

Adverse health effects resulting from skin exposure ot a substance.

Pairing

A favourable interaction of two electrons with opposite m , values in the same orbital.

Enzyme

A protein that acts as a catalyst in biological systems.

What are Compound Microscopes?

Most of the microscopes used today are compound. A compound microscope features two or more lenses. A hollow cylinder called the tube connects the two lenses.

The top lens, the one people look through, is called the eyepiece. The bottom lens is known as the objective lens. Below the two lenses is the stage, with the illuminator below that.

Ether

Compound in which an oxygen atom is bonded to two alkyl or two aryl groups, or one alkyl and one aryl group.