Answer:
CH4 + 2O2 -> CO2 + 2H2O
Explanation:
CH4 + O2 -> CO2 + H2O
There's 4 H's on the left side while only 2 on the right side. To fix this, multiply the H's on the right side by 2.
CH4 + O2 -> CO2 + 2H2O
Now there are 4 O's on the right side and only 2 on the left side so multiply the O's on the left side by 2 to get 4.
CH4 + 2O2 -> CO2 + 2H2O
Check to see if its balanced:
1 C, 4 H, 4 O = 1 C, 4 H, 4 O
They are balanced.
