Empirical and Molecular Formulas

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Presentation transcript:

Empirical and Molecular Formulas Objectives: 6.5 Determining the empirical or molecular formula for a compound using percent composition data

Calculating Molecular Formula Experimentally determined molar mass = n mass of empirical formula Molecular formula = (empirical formula) x n (This means all subscripts in the empirical formula must be multiplied by n to get the molecular formula.) Example: P. 335 (51, 52) Individual Practice: P.335 (53) Assignment : Moles Problem Set Worksheet