Chapter 3.1-3.5 Review packet Balancing and Stoichiometry

A 12 b 602 x 10 23 c 722 x 10 24 d 579 x 10 22 e 801

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a. 12 b. 6.02 x 10 23 c. 7.22 x 10 24 d. 5.79 x 10 22 e. 8.01 x 10 -3 31. What is the empirical formula of a compound that contains 27.0% S, 13.4% O, and 59.6% Cl? a. SOCl b. SOCl 2 c. S 2 OCl d. SO 2 Cl e. ClSO 4 32. What is the empirical formula of a hydrocarbon that is 89.94% by mass carbon? a. C 3 H 4 b. C 4 H 3 c. C 9 H 10 d. C 9 H e. C 8 H 6 33. What is the empirical formula for a compound that contains 29% Na, 41% S, and 30% O by mass? a. Na 2 S 2 O 3 b. NaSO 2 c. NaSO d. NaSO 3 e. Na 2 S 2 O 6 34. A compound contains 40.0% C, 6.71% H, and 53.29% O by mass. The molecular mass of the compound is 60.05 amu. The molecular formula of this compound is __________. a. C 2 H 4 O 2 b. CH 2 O c. C 2 H 3 O 4 d. C 2 H 2 O 4 e. CHO 2
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35. The empirical formula of a compound is NO 2 and the formula weight is (89 ñ 6) amu. The molecular formula is ____________. a. NO b. NO 2 c. N 2 O d. N 2 O 4 e. N 3 O 6 36. The empirical formula of a compound whose molecular formula is C 6 H 12 and whose molecular weight 84.16 amu is __________. a. CH 2 b. CH 3 c. C 6 H 12 d. C 2 H e. C 12 H 24 37. A compound with a molecular weight of 110.1 amu that contained only C, H, and O was analyzed by combustion. The combustion of a 5.19 g sample of the compound resulted in the formation of 12.4 g of carbon dioxide and 2.55 g of water. What is the molecular formula of this compound? a. C 6 H 6 O 2 b. C 3 H 3 O c. CH 3 O d. C 2 H 6 O 5 e. C 2 H 6 O 2 38. A 1.29 g sample of a compound composed of C, H, and O was burned in oxygen. If 1.26 g of CO 2 and 0.258 g of water were produced, the composition (by mass %) of the compound was _____% C, _____% H, and _____ O. a. 34.4, 2.90, 92.0 b. 12.6, 25.8, 61.6 c. 26.7, 2.24, 71.3 d. 12.0, 72.0, 16.0 e. 41.4, 3.44, 55.2 39. What is the molecular formula of a compound that is 37.9% carbon, 11.6% hydrogen, and 50.5% oxygen by mass, and that has a formula weight of 190.24 amu? a. C 7 H 26 O 5 b. C 3 H 11 O 3 c. C 6 H 22 O 6 d. C 8 H 30 O 4 e. C 5 H 19 O 40. Combustion analysis of 1.031 g of a compound with a formula weight of 180.27 amu and containing only carbon, hydrogen, and oxygen yielded 2.265 g CO 2 and 1.236 g H 2 O. What is the molecular formula of the compound? a. C 3 H 8 O b. C 9 H 24 O 3 c. C 10 H 28 O 2 d. C 6 H 20 O e. not enough information to determine
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Chapter 3.1-3.5 Review Packet Honors Chemistry 1. b 2. a 3. b 4. b 5. b 6. e 7. a 8. a 9. c 10. a 11. c 12. b 13. a 14. e 15. b 16. a 17. b 18. c 19. d 20. d 21. c 22. b 23. a 24. c 25. d 26. c 27. d 28. d 29. d 30. d 31. b 32. a 33. a 34. a 35. d 36. a 37. a 38. c 39. c 40. b
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a 12 b 602 x 10 23 c 722 x 10 24 d 579 x 10 22 e 801 x 10 3...

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