Empirical Formula IB chemistry standard level but also suitable for GCSE and A level chemistry 3.5 / 5 based on 7 ratings ? ChemistryCalculationsInternational BaccalaureateAll boards Created by: RachaelCreated on: 17-10-10 15:18 Empirical formula Shows the simplest whole number ratio of atoms of each element in a particle of the substance. Example: a compound contains 40.00% Carbon, 6.73% hydrogen and 53.27% oxygen by mass. Determine the empirical formula: C= 40/12.01=3.33 H=6.73/1.01=6.66 O=53.27/16.00= 3.33 Ratio is 3.33:6.66:3.33 = 1:2:1 therefore empirical formula is CH20 1 of 1
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