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A Compound of the general formula R-C-O-R1 where R and R1 may be the same or different, and may be either aliphatic or aromatic.

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Law of Partial Pressures (Dalton's Law)

The total pressure exerted by a mixture of gases is the sum of the partial pressures of the individual gases.

Supersaturated Solution

A solution that contains a higher than saturation concentration of solute, slight disturbance or seeding causes crystallization of excess solute.

Standard Molar Enthalphy of Formation

The amount of heat absorbed in the formation of one mole of a substance in a specified state from its elements in their standard states.

Atomic Radius

Radius of an atom.


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

Saturated Solution

Solution in which no more solute will dissolve.

Hydrogen Bond

A fairly strong dipole-dipole interaction (but still considerably weaker than the covalent or ionic bonds) between molecules containing hydrogen directly bonded to a small, highly electronegative atom, such as N, O, or F.


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

Formula Unit

The smallest repeating unit of a substance. The molecule for nonionic substances


The material in a distillation apparatus that is to be distilled.