For the following:
Highlight each subscript in RED.
Highlight each coefficient in BLUE.

H2O 5Cl2 2Mg 3H2O2

For the following
List the chemical symbols of each element.
Give the number of atoms of each element.

HCl CO2 Na2SO4

Balance the following chemical equations.

1. Cu2O + C → Cu + CO2

2. H2O2 → H2O + O2

Al + Fe3N2 → AlN + Fe

4. Ag2S → Ag + S8

5. ZnS + AlP → Zn3P2 + Al2S3

6. Fe(OH)3 → Fe2O3 + H2O

Given the two chemical equations, highlight in RED the one that is balanced.

7. a. 2Na + Cl2 → 2NaCl

b. 2Na + 2Cl2 → 2NaCl

8. a. C3H8 + 5O2 → 3CO2 + 4H2O b. 2C3H8 + 5O2 → 3CO2 + 8H2O

9. a. 2NH3 + 5O2 → 2NO + 3H2O b. 4NH3 + 5O2 → 4NO + 6H2O

10. a. Y(NO3)2 + GaPO4 → YPO4 + Ga(NO3)2

b. 2Y(NO3)2 + 2GaPO4 → 2YPO4 + Ga(NO3)2