General chemistry

General chemistry

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General chemistry

Arrhenius equation

Chemistry; General chemistry

In 1889, Svante Arrhenius explained the variation of rate constants with temperature for several elementary reactions using the relationship k = A exp(-E a /RT) where the rate constant k is the ...

Avogadro

Chemistry; General chemistry

Italian chemist and physicist Amadeo Avogadro (1776-1856) proposed a correct molecular explanation for Gay-Lussac's law of combining volumes . His work provided a simple way to determine atomic ...

Avogadro number

Chemistry; General chemistry

The number of particles in one mole, equal to 6.02214199 × 1023 mol-1 (± 0.00000047 mol-1) (1998 CODATA values)

Equal volumes of an ideal gas contain equal numbers of molecules, if both volumes are at the same temperature and pressure. For example, 1 L of ideal gas contains twice as many molecules as 0.5 L of ...

Balmer series

Chemistry; General chemistry

A series of lines in the emission spectrum of hydrogen that involve transitions to the n=2 state from states with n>2.

Baumé

Chemistry; General chemistry

A, Be scale related to specific gravities , devised by the French chemist Antoine Baumé for marking hydrometers . At 60°F, specific gravity can be calculated from degrees Baumé by the following ...

Beer's law

Chemistry; General chemistry

In absorption spectroscopy , the absorbance of a dilute solution is equal to its absorptivity times the path length times the concentration of the absorbing solute.