1. Endothermic or Exothermic Picture Identification
Chapter 13

2. 1. Endothermic or Exothermic?

3. 2. Endothermic or Exothermic?

4. 3. Endothermic or Exothermic?

5. 4. Endothermic or Exothermic?

6. 5. Endothermic or Exothermic?

7. 6. What coefficient would balance the following equation?
2H2 + O2 → ?H2O

8. 7. What coefficient would balance the following equation?
CH4 + ?O2 → CO2 + 2H2O

9. 8. Does this represent the law of conservation of mass?

10. 9. How many grams of milk would there be?

11. 10. How does this picture represent the law of conservation of mass?

12. 11. If the S’more had a mass of 34 grams, the chocolate had a mass of 18 grams, and the graham crackers had a mass of 9 grams, what would the mass of the marshmallow be?

13. 12. How many total atoms?
3CaO2(H2O)2(Cl4)2

14. 12. How many oxygen atoms?
2CaO4(H2O)2(Cl4)2