Pre-test
1-6 Balance and give the type of reaction
1. Fe + O2 ---> Fe3O4
2. HgO ---> Hg + O2
3. FeS2 + O2 ---> Fe2O3 + SO3
4. Al + Pb(NO3)2 ---> Al(NO3)3 + Pb
5. ZnCl2 + KOH ---> Zn(OH)2 + KCl
6. C6H6 + O2 ---> CO2 + H2O
7-10 Complete and balance
7. Ca(OH)2 + Na3PO4 --->
8. Al + Cl2 --->
9. Mg + HCl --->
10. CH3OH + O2 ---> CO2 + H2O
11-15 Write the complete reaction and balance
11. hydrogen gas reacts with chlorine gas
12. iron (III) hydroxide + hydrochloric acid
13. copper (II) oxide reacts with sulfuric acid
14. zinc reacts with silver nitrate
15. methane (CH4) is burned in air