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Compound in which an oxygen atom is bonded to two alkyl or two aryl groups, or one alkyl and one aryl group.

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Heat of Solution

The amount of heat absorbed in the formation of solution that contains one mole of solute, the value is positive if heat is absorbed (endothermic) and negative if heat is released (exothermic).

Flotation

Method by which hydrophobic (water-repelling) particles of an ore are separated from hydrophilic (water-attracting) particles of a metallurgical pretreatment process.

Heat

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

Polymer

A large molecule consisting of chains or rings of linked monomer units, usually characterized by high melting and boiling points.

Mole Fraction

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

 

Photochemical Smog

A brownish smog occurring in urban areas receiving large amounts of sunlight, caused by photochemical (light-induced) reactions among nitrogen oxides, hydrocarbons and other components of polluted air that produce photochemical oxidants.

 

Cyclotron

A device for accelerating charged particles along a spiral path.

Isomers

Different substances that have the same formula.

Semipermable Membrane

A thin partition between two solutions through which certain molecules can pass but others cannot.

Specific Rate Constant

An experimentally determined (proportionality) constant, which is different for different reactions and which changes only with temperature, k in the rate-law expression: Rate = k [A] x [B]v.