8024840.pdf - Empirical and Molecular Formulas 1 A sample of lead arsenat contains 1.3813 g of lead 0.00672 g of hydrogen 0.4995 g of arsenic and 0.4267

8024840.pdf - Empirical and Molecular Formulas 1 A sample...

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Empirical and Molecular Formulas 1. A sample of lead arsenat contains 1.3813 g of lead, 0.00672 g of hydrogen, 0.4995 g of arsenic, and 0.4267 g of oxygen. Calculate the empirical formula. (PbHAsO 4 ) 2. Determine the molecular formulas of ibuprofen, a common headache remedy. Analysis yields a molar mass of 206 g/mol and a percent composition of 75.7% C, 8.80% H and 15.5% O. (C 13 H 18 O 2 ) 3. Vanadium oxide is used as an industrial catalyst. The percent composition 56.0% V and 44.0% O. Determine the empirical formula. (V 2 O 5 ) 4. The hydrocarbon used in the manufacture of foam plastics is called styrene. Analysis of styrene indicates the compound is 92.25% C and 7.75% H and has a molar mass of 104 g/mo. Determine the molecular formula for styrene. (C 8 H 8 ) 5. What is the empirical formula of a compound that contains 7.22 g Ni, 2.53g P, 5.25 g O.
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Unformatted text preview: (Ni 3 P 2 O 8 ) 6. Succinic acid is a substance produced by lichens. It is composed of 40.68% carbon, 5.08% hydrogen, 54.24% oxygen and has a molar mass of 118.1 g/mol. What is the molecular formula? (C 4 H 6 O 4 ). 7. Analysis of a compound containing chlorine and lead reveals that the compound is 59.37% lead. The molar mass of the compound is 349.0 g/mol. What is the empirical formula and the molecular formula of this compound? (PbCl 4 ). 8. Glycerol is a thick, sweet liquid obtained as a byproduct of the manufacture of soap. Its percent composition is 39.12% C, 8.75% H, and 52.12% O. The molar mass is 92.11 g/mol. What is the molecular formula? (C 3 H 8 O 3 )...
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