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The absolute entropy of a substance in its standard state at 298 K.

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Ampere

Unit of electrical current, one ampere equals one coulomb per second.

 

Net Ionic Equation

Equation that results from canceling spectator ions and eliminating brackets from a total ionic equation.

yield

The quantity of product formed by the interaction of two or more substances, generally expressed as a percentage of the quantity obtained to that theoretically obtainable.

Double Salt

Solid consisting of two co-crystallized salts.

 

Autoionization

An ionization reaction between identical molecules.

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.

Contact Process

Industrial process by which sulfur trioxide and sulfuric acid are produced from sulfur dioxide.

Electrical Conductivity

Ability to conduct electricity.

Catenation

Bonding of atoms of the same element into chains or rings.
The bonding together of atoms of the same element to form chains.
The ability of an element to bond to itself.

Ionization Constant

Equilibrium constant for the ionization of a weak electrolyte.