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Jeopardy

Test your knowledge of mole calculations, Avogadro's number, stoichiometry, and chemical reactions with this interactive Jeopardy review game. Get ready to show off your chemistry skills!

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Jeopardy

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  1. Jeopardy

  2. Review Unit 3 Mole Stuff Avogadro & His Number PLUS MORE! Counting Particles Chemical Rxns Stoichiometry 100 100 100 100 100 200 200 200 200 200 300 300 300 300 300 400 400 400 400 400 500 500 500 500 500 600 600 600 600 600 Final Jeopardy

  3. Mole Stuff 100 What is a mole?

  4. Mole Stuff 100 - Answer A volumetric unit of measure. One mole has as many particles in it as Avogadro’s number.

  5. Mole Stuff200 What is the molar mass? How do you find it?

  6. Mole Stuff200 - Answer The molar mass is the mass of one mole of substance. It can be found by reading the atomic masses on the periodic table.

  7. Mole Stuff300 What is relative mass? How is it connected to the Periodic Table?

  8. Mole Stuff300 - Answer Relative masses are masses relative to the smallest mass available. The atomic masses on the Periodic Table are all relative to Hydrogen.

  9. Mole Stuff400 What is the molar mass of potassium oxide?

  10. Mole Stuff400 - Answer K2O 39 g/mol + 39 g/mol + 16 g/mol 94 g/mol

  11. Mole Stuff 500 How many moles are in a 12.0 g sample of iron (III) oxide?

  12. Mole Stuff500 - Answer 0.075 moles Fe2O3 Molar mass Fe2O3: 159.6 g/mol (12g) * (1mol/159.6g) = 0.075 mol

  13. Mole Stuff 600 What is the mass of 0.015 moles of calcium hydroxide?

  14. Mole Stuff600 - Answer 1.11 grams Ca(OH)2 Molar Mass Ca(OH)2: 74 g/mol (0.015mol) * (74g/1mol) = 1.11 g

  15. Avogadro & His Number100 What is Avogadro’s Number? What does it mean?

  16. Avogadro & His Number100 - Answer 6.02 x 1023 This is how many particles are in one mole of substance

  17. Avogadro & His Number200 How many silver atoms are contained in 0.650 grams of silver?

  18. Avogadro & His Number200 - Answer 3.63 x 1021 atoms (0.65g) * (1mol/107.9g) * (6.02x1023part/1mol) = 3.63 * 1021 particles

  19. Avogadro & His Number300 How many atoms are in 0.450 gram of iron?

  20. Avogadro & His Number300 - Answer 4.86 x 1021atoms Fe

  21. Avogadro & His Number400 How many molecules are in 13.2 grams of carbon dioxide?

  22. Avogadro & His Number400 - Answer 1.81 x 1023 molecules CO2

  23. Avogadro & His Number500 How many H2 molecules are there in 0.25 moles of H2?

  24. Avogadro & His Number500 - Answer 1.5 x 1023 particles H2

  25. Avogadro & His Number600 How many O atoms in 0.456 moles of AgNO3?

  26. Avogadro & His Number600 - Answer 8.24 x 1023 O atoms

  27. Counting Particles 100 How many oxygen atoms are represented by the formula Pb(C2O4)2 ?

  28. Counting Particles100 - Answer 8

  29. Counting Particles200 What is total number of atoms represented by the formula Fe2(SO4)3 ?

  30. Counting Particles200 - Answer 17

  31. Counting Particles 300 A 9.56 g sample of copper (II) sulfide is found to contain 6.35 g of copper. What is the percent by mass of the copper and sulfur in this compound?

  32. Counting Particles 300 - Answer 66.4% Cu and 33.6% S (6.35gCu/9.65g)*100% = 66.4% (3.21gS/9.65g)*100% = 33.6%

  33. Counting Particles 400 Given the diagram of the molecule below, write the empirical and molecular formulas. Label each.

  34. Counting Particles 400 - Answer Molecular: C2H6 Empirical: CH3

  35. Counting Particles 500 When 0.062 g of phosphorus burns in air, it forms 0.142 g of phosphorus oxide. Determine the empirical formula of phosphorus oxide.

  36. Counting Particles 500 - Answer P2O5 Convert mass to moles Ratio of Moles Whole # (0.062g P)*(1mol P/31g P) = 0.002mol P 1 x2 = 2 (0.08g O)*(1mol O/16g O) = 0.005mol O 2.5 x2 = 5

  37. Counting Particles 600 What is the molecular formula of each compound? Empirical FormulaActual Molar Mass of Compound CH 78 g/mole NO2 92 g/mole

  38. Counting Particles 600 - Answer C6H6 N2O4

  39. Chemical Rxns 100 Balance the following reaction: __Sr(OH)2 + __FeCl3 __SrCl2 + __Fe(OH)3

  40. Chemical Rxns 100 - Answer 3Sr(OH)2 + 2FeCl33SrCl2 + 2Fe(OH)3

  41. Chemical Rxns 200 What type of reaction is the following? C2H4 + 3O2 –> 2CO2 + 2H2O

  42. Chemical Rxns 200 - Answers COMBUSTION REACTION boom!

  43. Chemical Rxns 300 A reaction takes place in a test tube. You feel the bottom of the tube and it feels warm. Is the reaction exothermic or endothermic? WHY?

  44. Chemical Rxns 300 - Answer EXOTHERMIC The system is releasing heat to the surroundings – energy is exiting the system and moving into your hand.

  45. Chemical Rxns 400 Write a balanced chemical reaction for the reaction below: Magnesium hydroxide reacts with nitric acid (HNO3) to form water and magnesium nitrate.

  46. Chemical Rxns 400 - Answer Mg(OH)2 + 2HNO3 2H2O + Mg(NO3)2

  47. A A Chemical Rxns 500 What is the formula of the missing product molecule?

  48. Chemical Rxns 500 - Answer A2BCD

  49. Chemical Rxns 600 Write a balanced chemical reaction for the following reaction: The combustion of ethane gas, C2H6, produces carbon dioxide gas and water vapor. This reaction is exothermic.

  50. Chemical Rxns 600 - Answer 2C2H6 + 7O2 4CO2 + 6H2O

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