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

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Associated Ions

Short-lived species formed by the collision of dissolved ions of opposite charges.

Colligative Properties

Physical properties of solutions that depend upon the number but not the kind of solute particles present.

Dumas Method

A method used to determine the molecular weights of volatile liquids.

Chemical Kinetics

The study of rates and mechanisms of chemical reactions and of the factors on which they depend.

Heat of Vaporization

The amount of heat required to vaporize one gram of a liquid at its boiling point with no change in temperature. Usually expressed in J/g. The molar heat of vaporization is the amount of heat required to vaporize one mole of liquid at its boiling point with no change in temperature and usually expressed ion kJ/mol.

Acidic Salt

A salt containing an ionizable hydrogen atom. Acidic salt does not necessarily produce acidic solutions.

Proton

A subatomic particle having a mass of 1.0073 amu and a charge of +1, found in thew nuclei of atoms.

Hybridization

Mixing a set of atomic orbitals to form a new set of atomic orbitals with the same total electron capacity and with properties and energies intermediate between those of the original unhybridized orbitals.

Detergent

A soap-like emulsifer that contains a sulfate, SO3 or a phosphate group instead of a carboxylate group.

Endothermic

Describes processes that absorb heat energy.