empirical formula

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empirical formula

n.
A chemical formula that indicates the relative proportions of the elements in a molecule rather than the actual number of atoms of the elements.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

empirical formula

n
1. (Chemistry) a chemical formula indicating the proportion of each element present in a molecule: C6H12O6 is the molecular formula of sucrose whereas CH2O is its empirical formula. Compare molecular formula, structural formula
2. (General Physics) a formula or expression obtained from experimental data rather than theory
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

empir′ical for′mula


n.
a chemical formula showing the elements of a compound and their relative proportions, as (CH2O)n or H2O.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.empirical formula - a chemical formula showing the ratio of elements in a compound rather than the total number of atoms
chemical formula, formula - a representation of a substance using symbols for its constituent elements
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References in periodicals archive ?
Similarly for manure anaerobic digestion gas with 60% C[H.sub.4] and 40% C[O.sub.2], the C normalized empirical formulae is C[H.sub.2.4][O.sub.0.8].
Empirical formulae for [[DELTA].sub.u] (mm), [F.sub.u] (kN), [k.sub.eq] (kN/mm) and d (mm) can be fitted by the least square method and described as:
Frequency analysis, Probable Maximum Flood (PMF) approach, Empirical formulae and Rational methods are the most commonly used method all over the world.
The transmission characteristics and effective impedance are carefully discussed in Section 2, where a concept of designable CRLH-TL is presented, and several empirical formulae are derived based on which the arbitrary characteristic impedance can be easily achieved at any required frequency-band.

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