CH4 + O2—> Co2+HO2–>Co2+H2O

CH4 + 2O2 —> CO2 + 2H2O

Explanation:

CH4 + O2 —> CO2 + H2O

The above equation can be balance as follow:

Therefore are 4 atoms of H on the left side of the equation and 2 atoms on the right side. It can be balance by putting 2 in front of H2O as shown below:

CH4 + O2 —> CO2 + 2H2O

Now, there are a total of 4 atoms of O on the right side and 2 atoms on the left. It can be balance by putting 2 in front of O2 as shown below:

CH4 + 2O2 —> CO2 + 2H2O

Now, we can see that the equation is balanced as there are equal numbers of atoms of the different elements present on both sides of the equation.

your answer would be a. 12.5 kg

explanation: no but i do not usually comment