Balance Chemical Equations;

1. C2H6(g)+O2(g)---->H2O(g)+CO2(g)
Answer: 2C2H12(g)+2O7---->H12O6+2C2+O8

No. You forgot the biggest rule of all. You may NOT change subscripts. You may balance ONLY with coefficients.

To balance the chemical equation C2H6(g) + O2(g) --> H2O(g) + CO2(g), you need to make sure that the number of atoms of each element is the same on both sides of the equation.

Here is the step-by-step process to balance this equation:

1. Start with the unbalanced equation: C2H6(g) + O2(g) --> H2O(g) + CO2(g)

2. Count the number of carbon atoms on each side of the equation. There are 2 carbon atoms in C2H6 and 1 carbon atom in CO2. To balance the carbon atoms, you can add a coefficient of 2 in front of CO2: C2H6(g) + O2(g) --> H2O(g) + 2CO2(g)

3. Count the number of hydrogen atoms on each side of the equation. There are 6 hydrogen atoms in C2H6 and 2 hydrogen atoms in H2O. To balance the hydrogen atoms, you can add a coefficient of 3 in front of H2O: C2H6(g) + O2(g) --> 3H2O(g) + 2CO2(g)

4. Count the number of oxygen atoms on each side of the equation. There are 2 oxygen atoms in O2 and 3 oxygen atoms in H2O. To balance the oxygen atoms, you can add a coefficient of 7/2 (or 3.5) in front of O2: C2H6(g) + 3.5O2(g) --> 3H2O(g) + 2CO2(g)

To have whole number coefficients, you can multiply the entire equation by 2 to eliminate the fraction: 2C2H6(g) + 7O2(g) --> 6H2O(g) + 4CO2(g)

Therefore, the balanced equation is: 2C2H6(g) + 7O2(g) --> 6H2O(g) + 4CO2(g)