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Weighted average of the masses of the constituent isotopes of an element, The relative masses of atoms of different elements.

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Water Equivalent

The amount of water that would absorb the same amount of heat as the calorimeter per degree temperature increase.

Allotropic Modifications (Allotropes)

Different forms of the same element in the same physical state.

Mass

A measure of the amount of matter in an object. Mass is usually measured in grams or kilograms.

Solvent

The dispersing medium of a solution.

Mechanism

The sequence of steps by which reactants are converted into products.

Specific Heat

The amount of heat required to raise the temperature of one gram of substance one degree Celsius.

Secondary Standard

A solution that has been titrated against a primary standard. A standard solution is a secondary standard.

 

Le Chatelier's Principle

States that a system at equilibrium, or striving to attain equilibrium, responds in such a way as to counteract any stress placed upon it.
If a stress (change of conditions) is applied to a system at equilibrium, the system shifts in the direction that reduces stress.

Ampere

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

 

Homologous Series

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