4. Tuesday, May 13 th : “A” Day Wednesday, May 14 th : “B” Day Agenda  Chapter 7 Review Review  Chapter 7 Jeopardy Review Next time: Concept Review due Concept Review due Chapter 7 Test Chapter 7 Test

5. Chapter 7 Review 2. What term is used to describe the mass in grams of 1 mol of a substance? Molar Mass

6. Chapter 7 Review 35. How many atoms of gold are there in a pure gold ring with a mass of 10.6 g? 10.6 g Au X 1 mole Au =.0538 moles Au 196.97 g Au 196.97 g Au.0538 moles Au X 6.022 X 10 23 atoms Au 1 mole Au 1 mole Au 3.24 x 10 22 atoms Au

7. Chapter 7 Review 45. Find the molar mass of the following compounds: c)Potassium dichromate K 1+ Cr 2 O 7 2- K 2 Cr 2 O 7 K: 2(39.10) = 78.20 +Cr: 2(52.00) = 104.00 O: 7(16.00) = 112.0 294.20 g/mol 294.20 g/mol

8. Chapter 7 Review 45. Find the molar mass of the following compounds: d)Magnesium nitrate Mg 2+ NO 3 1- Mg(NO 3 ) 2 Mg(NO 3 ) 2 Mg: 24.31 = 24.31 +N: 2(14.01) = 28.02 O: 6(16.00) = 96.00 148.33 g/mol 148.33 g/mol

9. Chapter 7 Review 50. A n oxide of phosphorus is 56.34% phosphorus, and the rest is oxygen. Calculate the empirical formula for this compound. 56.34 g P X 1 mol P = 1.819 mol P = 1 mol P (2) 30.97 g P 1.819 2 mol P 43.66 g O X 1 mol O = 2.729 mol O = 1.5 mol O (2) 16.00 g O 1.819 3 mol O P2O3

10. Chapter 7 Review 51. The empirical formula of the anticancer drug altretamine is C 3 H 6 N 2. The experimental molar mass is 210 g/mol. What is the molecular formula? C: 3(12.01) = 36.03 210 = 3 +H: 6(1.01) = 6.06 70.11 N: 2(14.01) = 28.02 70.11 g/mol 70.11 g/mol 3(C 3 H 6 N 2 ) = C 9 H 18 N 6 3(C 3 H 6 N 2 ) = C 9 H 18 N 6

11. Jeopardy Teams 2A Team #1: Megan, Chris, Emily, Taylor, Jordan Team #2: Connor, Colleen, Ben, Desiree, Rachael Team #3: Paityn, Zendra, Jake, Ashley, Tabitha Team #4: Austin, Drew, Krits, Lauren, Allie Team #5: Stephanie, Jackie, Lydia, Brooke, Mya

12. Jeopardy Teams 4A Team #1: Troy, Cody, Anna, Daleah Team #2: Jordan, Rebecca, Abby Team #3: Josh, Ashley, Sarah Team #4: Morgan, Eric, Brook Team #5: Tate, Mason, Korey

13. Jeopardy Teams 1B Team #1: Autumn, Ashley, Kyle, Morgon Team #2: Christian, Allie, Hunter, Kelsey Team #3: Alyssa, Andy, Rachel M., Krysta Team #4: Phoenix, Emily, Mason, Whitney Team #5: Rachel D., Sydney, Michael

14. Jeopardy Teams 3B Team #1: Kellie, RJ, Tom, Allysa Team #2: Merik, Danika, Michelle, Holly Team #3: Kenzie, Justin, Adam, Kaitlyn Team #4: Hunter, Molly, Eryn, Noah Team #5: Shelby, Dylan, Alexandra

15. Chapter 7 “The Mole & Chemical Composition”

16. THE RULES: There will be 5 teams Mrs. Elfline’s decisions are final – that means no whining! Each member of the winning team will receive $1 mole money

17. And now…here is the host of Jeopardy… Mrs. Elfline

18. Let’s Get Ready to play… Today’s Categories are:

19. Definitions

20. This ‘n That This ‘n That

21. Calculations

23. Rebus Puzzles Rebus Puzzles

24. $100 $200 $300 $400 $500 Definitions $100 $200 $300 $400 $500 This ‘n That This ‘n That $100 $200 $300 $400 $500 Calculations $100 $200 $300 $400 $500 Calculations $100 $200 $300 $400 $500 Rebus Puzzles Rebus Puzzles FJ

25. The number of atoms in 1 mole of any pure substance Answer…

26. Avogadro’s Number OR 6.022 X 10 23 100

27. The unit for molar mass Answer…

28. g/mole OR grams per mole 200

29. What 2 things does a chemical formula tell you? Answer…

30. 1. What elements are in a compound 2. How many atoms of each element are in a compound 300

31. A formula that shows the simplest whole-number ratio of the atoms in a compound Answer…

32. Empirical Formula 400

33. What are isotopes? What are isotopes? Answer…

34. Atoms of the same element that have different number of neutrons. 500

35. Answer… Which has more atoms: 1 mole of gold or 1 mole of silver? 1 mole of gold or 1 mole of silver?

36. 100 They both have the same number of atoms, 6.022 X 10 23

37. Answer… How many hydrogen atoms are there in 1 molecule of ammonium carbonate, (NH 4 ) 2 CO 3 ?

38. 8 200

39. To find the molecular formula from the empirical formula, you need to calculate… Answer…

40. The Molar Mass of the Empirical Formula 300

41. As the atomic masses of the elements in the periodic table decreases, the number of atoms in one mole of the element… Answer…

42. Stays the same 1 mole = 6.022 X 10 23 atoms of ANY element 400

43. If a compound has a molecular formula of X 2 Y 4, what is it’s empirical formula? Answer…

44. XY 2 500

45. How many atoms are present in 2.5 moles of aluminum, Al? Answer…

46. 1.5 X 10 24 atoms Al 100

47. How many moles of gold are present in 150 grams of Au? Answer…

48. .76 moles Au 200

49. A compounds empirical formula is BH 3. If the experimental molar mass is 27.67 g/mole, what is the molecular formula? Answer…

50. B2H6B2H6B2H6B2H6 300

51. What is the percentage composition of HCl? Answer…

52. 2.77 % Hydrogen 97.23 % Chlorine 400

53. Calculate the molar mass of calcium nitrate, Ca(NO 3 ) 2. Answer…

54. 164.10 g/mole 500

55. Calculate the molar mass of titanium(IV) oxide, TiO 2. Answer…

56. 79.87 g/mole 100

57. What is the mass (in grams) of 5.600 moles of sodium, Na? Answer…

58. 128.7 grams Na 200

59. Calculate the average atomic mass of rubidium if 72.17% of its atoms have a mass of 84.91 amu and 27.83% of its atoms have a mass of 86.91 amu. Answer…

60. 85.47 amu 300

61. What is the percentage composition of quartz, SiO 2 ? Answer…

62. 46.75 % Si 53.25 % O 400

63. What is the empirical formula for a compound that is 33.36 % calcium, 26.69 % sulfur, and 40.00 % oxygen? Answer…

64. CaSO 3 500

65. Answer…

66. Scrambled Eggs 100

67. Answer…

68. Forgive and forget (4 give/ 4 get) 200

69. Answer…

70. No U turn 300

71. Answer…

72. Diamond in the rough 400

73. Answer…

74. Missing you (U) 500

75. Daily Double How much do you want to wager? Daily Double Daily Double

76. FINAL JEOPARDY

77. CATEGORY: Rebus Puzzles How much do you want to wager? Proceed…

79. You are full of baloney! (below knee) Proceed…

80. Thanks for PLAYING!