| The Columbia Encyclopedia, Sixth Edition. 2001-07. |
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| mole, in chemistry |
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| in chemistry, a quantity of particles of any type equal to Avogadro’s number, or 6.02×1023 particles. One gram-molecular weight of any molecular substance contains exactly one mole of molecules. The term mole is often used in place of gram-molecular weight; e.g., one speaks of 18 grams of water as one mole of water rather than as one gram-molecular weight of water. The mole is a unit in the International System of Units (SI). |
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| | | The Columbia Encyclopedia, Sixth Edition. Copyright © 2007 Columbia University Press. |
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