Question

Write “yes” or “no” 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

My answers:

1.yes
2.yes
3.no
4.no
5.yes
6.yes
7.yes
8.no
9.yes
10.yes
11.no
12.yes
13.yes
14.yes
15.yes

Answer 1

Those look ok to me to let me put a bug in your ear. By typing your answers AT THE END we must scroll down the page to find the answer. Why not write the equation and write yes out to the right or just underneath. That way we can see immediately if all is ok without scrolling down the board. All of that takes time AND we may forget what was at the top or transpose answers and questions.

Answer 2

12 : is false everything else looks great