9. $100 $200 $300 $400 $500 $100 $200 $300 $400 $500 $100 $200 $300 $400 $500 $100 $200 $300 $400 $500 $100 $200 $300 $400 $500 $100 $200 $300 $400 $500

11. 6.02 x 10 23

15. 1.5 x 10 24 molecules 2.5 moles 6.02 x 10 23 molecules 1 mole

16. How many moles are there if I have 3.01 x 10 23 molecules?

17. 3.01 x 10 23 molecules 1 mole__________ 6.02 x 10 23 molecules

22. What is the molar mass of HBr?

24. How many moles are there in 150 grams of Argon?

25. 150 grams Ar 1 mole Ar 39.95 grams

27. 5.4 moles CO 28.01 grams 1 mole CO

28. What is the molar mass of Al 2 (SO 4 ) 3 ?

31. More moles = more atoms 5.01 x 10 23 atoms C vs. 1.5 x 10 23 atoms Ca

32. What is the mass of 1.33 x 10 22 atoms of Sb?

33. 1.33 x 10 22 atoms 1 mole 121.76 gram Sb 6.02 x 10 23 atoms 1 mole

35. 5 moles 22.4 liters 1 mole

37. What is 7.74 x 10 22 atoms of Hg? 25.8 grams 1 mole 6.02 x 10 23 atoms 200.59 g 1 mole

38. How many moles of Sulfur are there in 1 mole of Al 2 (SO 4 ) 3 ?

39. Al 2 (SO 4 ) 3

40. What is the mole ratio between Copper and silver in the following reaction? Cu + 2AgNO 3  2Ag + Cu(NO 3 ) 2

42. 2PbS + 3O 2  2PbO + 2SO 2 How many moles of PbO can be made from 6 moles of oxygen?

43. 6 moles O 2 2 moles PbO 3 moles O 2 2PbS + 3O 2  2PbO + 2SO 2

44. How many moles of PbS are required to react away 12 moles of oxygen?

45. 12 moles O 2 2 moles PbS 3 moles O 2 2PbS + 3O 2  2PbO + 2SO 2

46. 3H 2 + N 2  2NH 3 How many moles of ammonia will form from 5 moles of hydrogen?

47. 5 moles H 2 2 moles NH 3 3 moles H 2

48. 3H 2 + N 2  2NH 3 How many moles of nitrogen are needed to react away 0.005 moles of hydrogen?

49. 0.005 moles H 2 1 mole N 2 3 moles H 2

50. 3H 2 + N 2  2NH 3 What mass of of ammonia will form from 15.0 grams of nitrogen?

51. 15.0 g N 2 1 mole N 2 2 mol NH 3 17.04 g 28.02 g 1 mol N 2 1 mol

52. 2NO + O 2  2NO 2 What is the theoretical yield of NO 2 if 20.0 grams of NO reacts with excess oxygen?

53. 20.0 g NO 1 mol NO 2 mol NO 2 46.02 g NO 2 30.03 g NO 2 mols NO 1 mol

54. 3H 2 + N 2  2NH 3 If I want to make 35 grams of ammonia, what mass of hydrogen is required?

55. What is 6.2 grams 35 g NH 3 1 mol NH 3 3 mols NH 3 2.02g H 2 17.04 g 2 mols H 2 1 mol H 2

56. CaCO 3  CO 2 + CaO How much calcium carbonate will produce 18 grams of carbon dioxide ?

57. 18 g CO 2 1 mole CO 2 1 mol CaCO 3 100.09g 44.01g CO 2 1 mol CO 2 1 mol

60. 32 X 100 39

61. What is the percent nitrogen in NO 2 ?

62. 14.01 g N x 100 46.01 g NO 2

63. What is the empirical formula of C 12 H 20 O 6 ?

64. What is C 6 H 10 O 3 ? **Just reduce C 12 H 20 O 6

65. The empirical formula for a compound is CH 2 and the molecular mass is 56g/mole what is the molecular formula?

66. What is C 4 H 8 ? 56 = 4 14.01