from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun The number of items in a mole, approximately 6.0221 × 1023.
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- noun chemistry, physics The
numberof atomspresent in 0.012 kilogramsof isotopically pure Carbon-12, being 6.0221415 x 1023. By definition, the number of elementary entities( atomsor molecules) comprising one moleof a given substance.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun the number of molecules in a mole of a substance (approximately 602,250,000,000,000,000,000,000)
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Named after Amadeo Avogadro (1776 - 1856)
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