empirical formula
- noun
- /ɪmˈpɪrɪkəl ˈfɔrmjələ/
- Specialized
:
fórmula empírica
- To calculate the empirical formula of a compound, you need to determine the ratio of each element's atoms.
Examples
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Chemists often use an empirical formula to express the simplest form of a compound's composition.
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Re-entrained emission rates were derived by the following empirical formula, where PREFORMATTED TABLE
Academic text (2002) -
The empirical formula of water is H2O, which shows the simplest ratio of hydrogen to oxygen.
How Detailed
- Specialized
- Specialized
3
3.6
- Specialized
1
4.1
- Specialized
Surface Forms
Morphology
Although the constituents 'empirical' (based on observation) and 'formula' (a symbolic relation) are individually transparent, the phrase denotes a specific technical chemistry concept — the simplest whole-number ratio of elements — that is not directly derivable from those general meanings. Because this is a domain-specific term whose precise sense requires subject knowledge rather than simple composition, it would be opaque to a B1 learner who only knows the parts.
Etymology
The term empirical formula comes from using real measurements to make a simple recipe showing how many of each element are present in a substance. Empirical means from observation and formula is like a recipe, so the phrase shows the 'simplest whole-number ratio' of elements rather than the 'exact number of atoms'.