formula unit

American

noun

Chemistry.

(of an ionic compound that does not form molecules, as most salts) the chemical formula with the least number of elements out of the set of empirical formulas having the same proportion of ions as elements.

NaCl is the formula unit for the ionic compound sodium chloride.

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formula unit

The empirical formula mass for this compound is therefore 81.13 amu/formula unit, or 81.13 g/mol formula unit.

From Textbooks ● Feb. 14, 2019

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