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
1. Yes
2. Yes
3. No
4. Yes
5. Yes
6. Yes
7. Yes
8. Yes
9. Yes
10. Yes
11. Yes
12. Yes
13. Yes
14. Yes
15. Yes
To determine whether a chemical equation is balanced or not, you need to follow the steps of balancing equations. The goal is to ensure that there is an equal number of atoms on both sides of the equation.
Here's how to balance chemical equations:
1. Start by counting the number of atoms of each element on both sides of the equation.
2. If there is an imbalance, begin by adjusting the coefficients (the numbers in front of the chemical formulas) to ensure that the same number of atoms of each element is present on both sides.
3. Avoid changing the subscripts within the chemical formulas because that would result in different compounds altogether.
4. Keep balancing by adjusting the coefficients until the equation is balanced (the same number of atoms of each element on both sides).
Using this method, let's go through each chemical equation:
1. 2H2 + O2 ---> 2H2O
- This equation is already balanced because there are two hydrogen atoms and two oxygen atoms on both sides. So, the answer is Yes.
2. S8 + 12O2 ---> 8SO3
- This equation is also balanced because there are eight sulfur atoms and 24 oxygen atoms on both sides. So, the answer is Yes.
3. HgO ---> Hg + O2
- This equation is not balanced because there is one mercury (Hg) atom on the left side and none on the right side. So, the answer is No.
4. Zn + HCl ---> ZnCl2 + H2
- This equation is not balanced because there is one zinc (Zn) atom on the left side and two on the right side. So, the answer is No.
5. 2Na + 2H2O ---> 2NaOH + H2
- This equation is balanced because there are two sodium atoms, four hydrogen atoms, one oxygen atom, and one hydrogen atom on both sides. So, the answer is Yes.
Continue this process for the remaining chemical equations to determine whether they are balanced or not.