2. Jeopardy Molar Mass Avogadro’s Number Stoichiometry Limiting Reactant Emp/Molec Formula Q $100 Q $200 Q $300 Q $400 Q $500 Q $100 Q $200 Q $300 Q $400 Q $500 Final Jeopardy

3. $100 Question from H1 Determine the molar mass of sodium chloride.

4. $100 Answer from H1 58.44 g/mol

5. $200 Question from H1 Determine the molar mass of sulfuric acid.

6. $200 Answer from H1 98.08 g/mol

7. $300 Question from H1 Determine the molar mass of barium nitrate.

8. $300 Answer from H1 261.35 g/mol

9. $400 Question from H1 Determine the molar mass of ammonium sulfate.

10. $400 Answer from H1 132.16 g/mol

11. $500 Question from H1 Determine the molar mass of calcium acetate.

12. $500 Answer from H1 158.18 g/mol

13. $100 Question from H2 How many moles of silver is equal to 2.57 x 10 11 atoms of silver?

14. $100 Answer from H2 4.27 x 10 -13 mol Ag

15. $200 Question from H2 How many moles of potassium ions equals 2.845 x 10 12 potassium ions?

16. $200 Answer from H2 4.73 x 10 -12 mol K

17. $300 Question from H2 How many molecules of dihydrogen monoxide is equal to 0.0524 moles of dihydrogen monoxide?

18. $300 Answer from H2 3.15 x 10 22 molecules H 2 O

19. $400 Question from H2 How many moles of sulfuric acid do you have if you there are 1.64 x 10 12 molecules of sulfuric acid?

20. $400 Answer from H2 2.72 x 10 -12 mol H 2 SO 4

21. $500 Question from H2 If there are 8.24 x 10 22 molecules of sodium chloride in a salt shaker, what is the mass of the salt?

22. $500 Answer from H2 8.00 g NaCl

23. $100 Question from H3 Calculate the mass of 0.467 moles of calcium bromide.

24. $100 Answer from H3 93.3 g calcium bromide

25. $200 Question from H3 Calculate the moles of 35.7 milligrams of strontium nitrate.

26. $200 Answer from H3 1.69 x 10 -4 mol strontium nitrate

27. $300 Question from H3 Potassium and chlorine react to produce potassium chloride. Write the balanced reaction and determine how many grams of KCl is produced from 2.50 g of K and excess Cl 2.

28. $300 Answer from H3 2 K + Cl 2 ---> 2 KCl 4.77 g KCl

29. $400 Question from H3 Sodium oxide and dihydrogen monoxide react together to produce sodium hydroxide. Write the balanced reaction and determine how many grams of Na 2 O are required to produce 1.60 x 10 2 grams of NaOH.

30. $400 Answer from H3 Na 2 O + H 2 O ---> 2 NaOH 124 g Na 2 O

31. $500 Question from H3 Potassium chlorate decomposes into potassium chloride and oxygen. Write the balanced reaction and determine how many moles of O 2 can be produced from 12.00 moles of KClO 3.

32. $500 Answer from H3 2 KClO 3 ---> 2 KCl + 3 O 2 18.00 mol O 2

33. $100 Question from H4 If you start with 14.8 g of C 3 H 8 and 3.44 g of O 2, determine the limiting reagent. C 3 H 8 + 5 O 2 -------> 3 CO 2 + 4 H 2 O

34. $100 Answer from H4 Limiting Reactant = O 2

35. $200 Question from H4 If 10.0 g of Al 2 (SO 3 ) 3 is reacted with 10.0 g of NaOH, determine the number of moles of Al(OH) 3 produced. Al 2 (SO 3 ) 3 + 6 NaOH ------> 3 Na 2 SO 3 + 2 Al(OH) 3

36. $200 Answer from H4 0.068 mol Al(OH) 3

37. $300 Question from H4 If 25.4 g of Al 2 O 3 is reacted with 10.2 g of Fe, determine the number of grams of Fe 3 O 4 produced 4 Al 2 O 3 + 9 Fe ------> 3 Fe 3 O 4 + 8 Al

38. $300 Answer from H4 14.12 g Fe 3 O 4

39. $400 Question from H4 Which element is in excess when 3.00 grams of Mg is ignited in 2.20 grams of pure oxygen? 2Mg + O 2 ----> 2MgO

40. $400 Answer from H4 Excess Reactant: O 2

41. $500 Question from H4 What mass of ZnO is formed when 20.0 grams of MoO 3 is reacted with 10.0 grams of Zn? 3 Zn(s) + 2 MoO 3 (s) ----------> Mo 2 O 3 (s) + 3 ZnO(s)

42. $500 Answer from H4 12.4 g of ZnO will be produced

43. $100 Question from H5 A compound with an empirical formula of C 2 OH 4 and a molar mass of 88 grams per mole. Write the molecular formula.

44. $100 Answer from H5 C4O2H8C4O2H8

45. $200 Question from H5 When 5.00 g of FeCl 3 · xH 2 O are heated, 2.00 g of H 2 O are driven off. Find the chemical formula and the name of the hydrate.

46. $200 Answer from H5 chemical formula: FeCl 3 · 6H 2 O name: iron (III) chloride hexahydrate

47. $300 Question from H5 Calculate the mass percent composition of carbon, nitrogen and oxygen in acetamide, C 2 H 5 NO.

48. $300 Answer from H5 C: 40.67% H: 8.53% N: 23.71% O: 27.09%

49. $400 Question from H5 The percentage composition of acetic acid is found to be 39.9% C, 6.7% H, and 53.4% O. Determine the empirical formula of acetic acid.

50. $400 Answer from H5 CH 2 O

51. $500 Question from H5 A component of protein called serine has an approximate molar mass of 100 g/mole. If the percent composition is as follows, what is the empirical and molecular formula of serine? C = 34.95 % H= 6.844 % O = 46.56 % N= 13.59 %

52. $500 Answer from H5 empirical formula: C 3 H 7 NO 3 molecular formula: C 3 H 7 NO 3

53. Final Jeopardy This scientist developed a number that: Indicates the number of atoms in 12 grams of carbon-12 Is 6.02 x 10 23 particles in 1 mole (Spelling MUST be correct!)

54. Final Jeopardy Answer Avogadro