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Method of determining the rate-law expression by carrying out a reaction with different initial concentrations and analyzing the resultant changes in initial rates.

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Atom

The smallest particle of an element.

Hydrometer

A device used to measure the densities of liquids and solutions.

Cloud Chamber

A device for observing the paths of speeding particiles as vapor molecules condense on them to form foglike tracks.

Standard Electrodes

Half-cells in which the oxidized and reduced forms of a species are present at unit activity, 1.0M solutions of dissolved ions, 1.0atm partial pressure of gases, and pure solids and liquids.

Compressed Gas

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

Hydrogenation

The reaction in which hydrogen adds across a double or triple bond.

Denaturation

A process pertaining to a change in structure of a protein form regular to irregular arrangement of the polypeptide chains.

Free Radical

A highly reactive chemical species carrying no charge and having a single unpaired electron in an orbital.

End Point

The point at which an indicator changes colour and a titration is stopped.

Mass Deficiency

The amount of matter that would be converted into energy if an atom were formed from constituent particles.