How is mass determined from an empirical formula? Chemistry The Mole Concept Empirical and Molecular Formulas 1 Answer anor277 Mar 11, 2018 Well, normally we determine #"empirical formula"# from a mass... Explanation: ...or at least from #"a percentage composition"#. See this old answer. Answer link Related questions How do empirical formulas and molecular formulas differ? How do you find molecular formula of a compound? What is the chemical formula of a diamond? What is the chemical formula of a carbohydrate? What is the empirical formula for valproic acid? What is the empirical formula of magnesium oxide? Why is the empirical formula not double that of the monosaccharides? Question #5c3b5 What molecular formula represents a carbohydrate? What is the molecular formula of vinegar? See all questions in Empirical and Molecular Formulas Impact of this question 1257 views around the world You can reuse this answer Creative Commons License