1. Enthalpy Changes
Unit Conversion - Easy
Unit Conversion - Hard
Stoich. - Easy
Stoich - Hard 10 20 30 40 50

2. Enthalpy Changes - 10
To write a balanced equation with energy for an endothermic reaction, which side would you add your energy to?

3. Enthalpy Changes - 10
Reactants Side

4. Enthalpy Changes - 20
To write a balanced equation with energy for a reaction that releases heat/energy, which side would you add energy to?

5. Enthalpy Changes - 20
Products Side

6. Enthalpy Changes - 30 Balance the following equation with energy:
1 Pb(NO3) KI  2 K(NO3) + 1 PbI2
Exothermic Reaction with a 372 kJ enthalpy change

7. 1 Pb(NO3)2 + 2 KI  2 K(NO3) + 1 PbI2 + 372 kJ
Enthalpy Changes – 30
1 Pb(NO3) KI  2 K(NO3) + 1 PbI kJ

8. Enthalpy Changes - 40 Balance the following equation with energy:
1 C2H5OH + 3 O2  2 CO2 + 3 H2O
This reaction absorbed 934 kJ of energy

9. Enthalpy Changes – 40
934 kJ C2H5OH + 3 O2  2 CO2 + 3 H2O

10. Enthalpy Changes - 50 Balance the following equation:
1 HCl NaOH  1 H2O NaCl
This reaction had a starting energy of 380 kJ. After the reaction, the products’ ending energy was 220 kJ.

11. Enthalpy Changes – 50
1 HCl NaOH  1 H2O NaCl kJ

12. Unit Conversion - Easy - 10
Convert 16 miles into kilometers
1 mile = 1.61 km

13. Unit Conversion - Easy – 10

14. Unit Conversion - Easy - 20
Convert 9302 milliliters into liters
1 L = 1000 mL

15. Unit Conversion - Easy – 20

16. Unit Conversion - Easy - 30
Convert 20 hours into seconds

17. Unit Conversion - Easy – 30

18. Unit Conversion - Easy - 40
Convert milligrams into kilograms 1000 mg = 1 g, 1000 g = 1 kg

19. Unit Conversion - Easy – 40

20. Unit Conversion - Easy - 50
Convert 50 miles per hour into miles per second

21. Unit Conversion - Easy – 50

22. Unit Conversion - Hard - 10
How many ’s are in 5 *?
3 * = 7 

23. Unit Conversion - Hard – 10

24. Unit Conversion - Hard - 20
Convert 9 miles per hour into kilometers per minute
1 mile = 1.61 km

25. Unit Conversion - Hard – 20

26. Unit Conversion - Hard - 30
In the land of Hskdiz, a man wants to know how many quertizes he has if he has 23 jatyrs. The following conversions in the world of Hskdiz are as follows: 18 jatyrs = 3 yakators, 7 yakators = 2 quertizes

27. Unit Conversion - Hard – 30

28. Unit Conversion - Hard - 40
A man drinks 4 sodas per 15 hamburgers he eats. Each of his hamburgers contains 95 poppy seeds. How many poppy seeds does he eat if he drinks 9 sodas?

29. Unit Conversion - Hard – 40

30. Unit Conversion - Hard - 50
A lethal dose of caffeine for humans is 150 mg caffeine per 1 kg of weight, or 150 mg/kg. If a cup of coffee contains 95 mg of caffeine, how many cups would a 165 pound person have to drink in before reaching the lethal dose? 1 kilogram = 2.20 pounds

31. Unit Conversion - Hard – 50

32. Stoich. - Easy - 10 For the equation: 2 H2 + 1 O2  2 H2O
What is the ratio of oxygen to water?

33. Stoich. - Easy – 10
1:2

34. Stoich. - Easy - 20 For the equation: 2 H2 + 1 O2  2 H2O
Convert 2 moles of H2 into moles of H2O

35. Stoich. - Easy – 20

36. Stoich. - Easy - 30 For the equation: 2 H2 + 1 O2  2 H2O
Convert 4 moles of O2 into moles of H2

37. Stoich. - Easy – 30

38. Stoich. - Easy - 40
Convert 20 grams of H2O into moles of H2O

39. Stoich. - Easy – 40

40. Stoich. - Easy - 50
Convert 64 grams of O2 into molecules of O2

41. Stoich. - Easy – 50

42. Stoich. - Hard - 10 For the equation: 2 H2 + 1 O2  2 H2O
Convert 2 mol of H2 into grams of H2O

43. Stoich. - Hard – 10

44. Stoich. - Hard - 20 For the following equation:
1 C6H10O O2  6 CO H2O
Convert 9.1 grams of O2 into mols CO2

45. Stoich. - Hard – 20

46. Stoich. - Hard - 30 For the following equation:
1 C6H10O O2  6 CO H2O
Convert 3.4 grams of H2O into grams of O2

47. Stoich. - Hard – 30

48. Stoich. - Hard - 40 For the equation: 1 HCl + 1 NaOH  1 H2O + 1 NaCl
Determine the grams of NaCl formed if using 60 mL of a 4 M NaOH solution

49. Stoich. - Hard – 40

50. Stoich. - Hard - 50 For the equation: 2 H2 + 1 O2  2 H2O
You have 10 grams of H2 and 15 grams of O2. Determine the limiting reagent.

51. Stoich. - Hard – 50