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The mass of one molecule of a nonionic substance in atomic mass units.

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Conjugate Acid-base Pair

In Bronsted-Lowry terminology, a reactant and product that differ by a proton, H+.

Cis-

The prefix used to indicate that groups are located on the same side of a bon about which rotation is restricted.

Heterogeneous Mixture

A mixture that does not have uniform composition and properties throughout.

Resonance

The concept in which two or more equivalent dot formulas for the same arrangement of atoms (resonance structures) are necessary to describe the bonding in a molecule or ion.

Foam

Colloidal suspension of a gas in a liquid.

Total Ionic Equation

Equation for a chemical reaction written to show the predominant form of all species in aqueous solution or in contact with water.

Phase Diagram

Diagram that shows equilibrium temperature-pressure relationships for different phases of a substance.

Effective Collisons

Collision between molecules resulting in a reaction, one in which the molecules collide with proper relative orientations and sufficient energy to react.

 

Element

A substance that cannot be decomposed into simpler substances by chemical means.

Alkylbenzene

A compound containing an alkyl group bonded to a benzene ring.