1. Test #3 Review Questions

2. Identify the coefficient in the formula below and tell what it means
8SO3

3. Identify the coefficient in the formula below and tell what it means
8SO3
TELLS THE NUMBER OF MOLECULES PRESENT- IN THIS CASE, THERE ARE 8 MOLECULES

4. 2AgNO3 + CaCl2 → AgCl + Ca(NO3)2
Chemical equations like the one below represent…
2AgNO3 + CaCl2 → AgCl + Ca(NO3)2

5. 2AgNO3 + CaCl2 → AgCl + Ca(NO3)2
Chemical equations like the one below represent…
2AgNO3 + CaCl2 → AgCl + Ca(NO3)2
CHEMICAL CHANGES

6. Identify the products and reactants in the equation below.
8S + 12O2 → 8SO3

7. REACTANTS PRODUCTS 8S + 12O2 → 8SO3
Identify the products and reactants in the equation below.
8S + 12O2 → 8SO3
REACTANTS
PRODUCTS

8. Identify the subscript in the formula below and tell what it means
8SO3

9. Identify the subscript in the formula below and tell what it means
8SO3
TELLS THE NUMBER OF ATOMS PRESENT- IN THIS CASE, THERE ARE 24 ATOMS OF OXYGEN

10. temperature change gas produced color change
The list below identifies what…
temperature change gas produced color change

11. temperature change gas produced color change
The list below identifies what…
temperature change gas produced color change
Signs that a chemical change has occurred

12. Determine if the equation below is balanced or unbalanced.
Cu CO2  CuCO2

13. Determine if the equation below is balanced or unbalanced.
Cu CO2  CuCO2
Cu = 1
C= 1
O = 2
Cu = 1
C= 1
O = 2
BALANCED

14. Elements in the same group have what in common?

15. Elements in the same group have what in common?
Valence electrons
Chemical properties

16. What is the Law of Conservation of Mass?

17. Matter cannot be created nor destroyed
What is the Law of Conservation of Mass?
Matter cannot be created nor destroyed

18. Where are non-metals located on the periodic table?

19. Right side of the stair-step
Where are non-metals located on the periodic table?
Right side of the stair-step

20. The formulas below represent examples of…
CO2 H2O NaCl SO4

21. The formulas below represent examples of…
CO2 H2O NaCl SO4
Compound molecules

22. How many atoms of Calcium and Chlorine are in the formula below?
7CaCl2

23. How many atoms of Calcium and Chlorine are in the formula below?
7CaCl2
7 CALCIUM ATOMS
14 CHLORINE ATOMS

24. How many molecules are present in the formula below?
4CuSO4

25. 4CuSO4 How many molecules are present in the formula below?

26. Determine if the equation below is balanced or unbalanced.
Cl + O2  Cl2O3

27. Determine if the equation below is balanced or unbalanced.
Cl + O2  Cl2O3
Cl = 1
O = 2
Cl = 2
O = 3
UNBALANCED