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General chemistry
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General chemistry
Order
Chemistry; General chemistry
The order of a reaction is the sum of concentration exponents in the rate law for the reaction. For example, a reaction with rate law d(C)/dt = k(A)2(B) would be a third order reaction. Noninteger ...
Unit
Chemistry; General chemistry
A standard for comparison in measurements. For example, the metre is a standard length which may be compared to any object to describe its length.
Collision frequency
Chemistry; General chemistry
The average number of collisions that a molecule undergoes each second.
Internal energy
Chemistry; General chemistry
Internal energy (U) is defined so that changes in internal energy ( U) are equal to the heat absorbed or released by a process running at constant volume. While changes in internal energy can be ...
Redox reaction
Chemistry; General chemistry
A reaction that involves transfer of electrons from one substance to another. Redox reactions always involve a change in oxidation number for at least two elements in the reactants.
Anhydrous
Chemistry; General chemistry
A compound with all water removed, especially water of hydration. For example, strongly heating copper(II) sulphate pentahydrate (CuSO4•5H2O) produces anhydrous copper(II) sulphate (CuSO4).
Extraction
Chemistry; General chemistry
A technique for separating components in a mixture that have different solubilities . For example, caffeine can be separated from coffee beans by washing the beans with supercritical fluid carbon ...
