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.

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

empir′ical for′mula


n.
a chemical formula showing the elements of a compound and their relative proportions, as (CH2O)n or H2O.
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
Translations
References in periodicals archive ?
If years ago the semi-empirical or empirical formulae were used, together with graphs for different coefficients employed in design, at present many software applications have facilities regarding the trend line or the approximation of different data, by using graphical colourful representations which offer a facile overview regarding the results.
The authors provide a cross-referenced index to the introduction and chapter on tools and an index of empirical formulae.
Traditional approaches for deducing empirical formulae from mass spectrometry data are said to often depend on very high mass accuracy, which carries a corresponding high cost and considerable time input from the user to eliminate low-probability structures.

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