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A form of energy that flows between two samples of matter because of their differences in temperature.

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Reaction Stoichiometry

Description of the quantitative relationships among substances as they participate in chemical reactions.

Atomic Mass Unit (amu)

One twelfth of a mass of an atom of the carbon-12 isotope, a unit used for stating atomic and formula weights, also called dalton.

Levorotatory

Refers to an optically active substance that rotates the plane of plane polarized light counterclockwise, also called levo.

Tyndall Effect

The scattering of light by colloidal particles.

Vapor Pressure

The particle pressure of a vapor at the surface of its parent liquid.

Mole Fraction

The number of moles of a component of a mixture divided by the total number of moles in the mixture.

 

Chain Termination Step

The combination of two radicals, which removes the reactive species that propagate the change reaction.

Coulomb

Unit of electrical charge.

Geometrical Isomers

Compounds with different arrangements of groups on either side of a bond with restricted rotation, such as a double bond or a single bond in a ring, for example cis-trans isomers of certain alkenes. Stereoisomers that are not mirror images of each other, also known as position isomers.

Colligative Properties

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