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Any of a group of dyes having a molecular structure related to that of xanthene in which the aromatic (C6H4) groups are the chromophore.

 

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Polar Bond

Covalent bond in which there is an unsymmetrical distribution of electron density.

Organic Chemistry

The chemistry of substances that contain carbon-hydrogen bonds.

Mass

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

Hydrogen-Oxygen Fuel Cell

Fuel cell in which hydrogen is the fuel (reducing agent) and oxygen is the oxidizing agent.

 

Hydride

A binary compound of hydrogen.

 

Continuous Spectrum

Spectrum that contains all wave-lengths in a specified region of the electromagnetic spectrum.

Deuterium

An isotope of hydrogen whose atoms are twice as massive as ordinary hydrogen,deuterion atoms contain both a proton and a neutron in the nucleus.

Enthalpy

The heat content of a specific amount of substance, defined as E= PV.

Valence Electrons

Outermost electrons of atoms, usually those involved in bonding.

Saponification

Hydrolysis of esters in the presence of strong soluable bases.