empirical formula

American  

noun

Chemistry.

1. a chemical formula indicating the elements of a compound and their relative proportions, as (CH 2 O) n .

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empirical formula British  

noun

1. a chemical formula indicating the proportion of each element present in a molecule Compare molecular formula structural formula

   C6H12O6 is the molecular formula of sucrose whereas CH2O is its empirical formula

2. a formula or expression obtained from experimental data rather than theory

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empirical formula Scientific  

1. A chemical formula that indicates the relative proportions of the elements in a molecule rather than the actual number of atoms of the elements. The empirical formula of a compound may be simpler than its molecular formula, which is a multiple of the empirical formula. For example, glucose has the molecular formula C ₆ H ₁₂ O ₆ but the empirical formula CH ₂ O.

2. Compare molecular formula structural formula

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Etymology

Origin of empirical formula

First recorded in 1820–30

Compare meaning

How does empirical-formula compare to similar and commonly confused words? Explore the most common comparisons:

• empirical formula vs. molecular formula

Example Sentences

Consider as another example a sample of compound determined to contain 5.31 g Cl and 8.40 g O. Following the same approach yields a tentative empirical formula of:

From Textbooks • Feb. 14, 2019

The molecular formula is thus derived from the empirical formula by multiplying each of its subscripts by three:

From Textbooks • Feb. 14, 2019

What is the empirical formula for this compound?

From Textbooks • Feb. 14, 2019

If 0.0923 g of silicon reacts with sulfur to give 0.3030 g of silicon sulfide, determine the empirical formula of silicon sulfide.

From Textbooks • Feb. 14, 2019

Guetta is himself evidently at a loss to grasp the significance of the empirical formula, "Listen and imitate."

From The Psychology of Singing A Rational Method of Voice Culture Based on a Scientific Analysis of All Systems, Ancient and Modern by Taylor, David C. (David Clark)