University of Houston CHEM 3332 Empirical/Molecular Formula Practice Worksheet Directions: Find the empirical AND molecular formulas given the percent compositions or masses. SHOW YOUR WORK to receive full credit. 1) 26.4 % Carbon 3.3 % Hydrogen 70.3 % Oxygen Molar Mass: 91.0 g/mol 26.4*(1/12.011)=1 3.3*(1/1.008)=1 70.3*(1/15.999)=2 12.011+1.008+2(15.999)=44.999 91.0/44.999=2 Emp ...[Show More]
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