Write “yes” or “no” on the equations below if the chemical equation is balanced or not.
1. 2H2 + O2 --- 2H2O
2. S8 + 12O2 --- 8SO3
3. HgO --- Hg + O2
4. Zn + HCl --- ZnCl2 + H2
5. 2Na + 2H2O --- 2NaOH + H2
6. 2Al + 3FeO --- Al2O3 + 3Fe
7. 4Si2H3 + 11O2 --- 8SiO2 + 6H2O
8. Fe + O2 --- Fe2O3
9. 2C7H6O2 + 15O2 --- 14CO2 + 6H2O
10. 4FeS2 + 11O2 --- 2Fe2O3 + 8SO2
11. Fe2O3 + H2 --- Fe + H2O
12. 2K + 2Br2 --- 2KBr
13. 2C2H2 + 5O2 --- 4CO2 + 2H2O
14. 2H2O2 --- 2H2O + O2
15. C7H16 + 11O2 --- 7CO2 + 8H2O

Question

Write “yes” or “no” on the equations below if the chemical equation is balanced or not.
1. 2H2 + O2 ---> 2H2O
2. S8 + 12O2 ---> 8SO3
3. HgO ---> Hg + O2
4. Zn + HCl ---> ZnCl2 + H2
5. 2Na + 2H2O ---> 2NaOH + H2
6. 2Al + 3FeO ---> Al2O3 + 3Fe
7. 4Si2H3 + 11O2 ---> 8SiO2 + 6H2O
8. Fe + O2 ---> Fe2O3
9. 2C7H6O2 + 15O2 ---> 14CO2 + 6H2O
10. 4FeS2 + 11O2 ---> 2Fe2O3 + 8SO2
11. Fe2O3 + H2 ---> Fe + H2O
12. 2K + 2Br2 ---> 2KBr
13. 2C2H2 + 5O2 ---> 4CO2 + 2H2O
14. 2H2O2 ---> 2H2O + O2
15. C7H16 + 11O2 ---> 7CO2 + 8H2O