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One equivalent weight of a substance is produced at each electrode during the passage of 96,487 coulombs of charge through an electrolytic cell.

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Differential Thermometer

A thermometer used for accurate measurement of very small changes in temperature.

Condensed Phases

The liquid and solid phases, phases in which particles interact strongly.

Double Bond

Covalent bond resulting from the sharing of four electrons (two pairs) between two atoms.

Oil

Liquid triester of glycerol and unsaturated fatty acids.

Monoprotic Acid

Acid that can form only one hydronium ion per molecule, may be strong or weak. Acid that contains one ionizable hydrogen atom per formula unit.

Ore

A natural deposit containing a mineral of an element to be extracted.

Alkynes

Unsaturated hydrocarbons that contain one or more carbon-carbon triple bonds.

Heat of Fusion

The amount of heat required to melt one gram of solid at its melting point with no change in temperature. Usually expressed in J/g. The molar heat of fusion is the amount of heat required to melt one mole of a solid at its melting point with no change in temperature and is usually expressed in kJ/mol.

Electron

A subatomic particle having a mass of 0.00054858 amu and a charge of 1-.

Boiling Point Elevation

The increase in the boiling point of a solvent caused by the dissolution of a nonvolatile solute.