Respuesta :
The only thing not balanced is the Oxygen gas (O2). Since you have carbon dioxide, you have 2 oxygens there and 2 oxygens since there are 2 waters on the right. So you have 2 on the left and 4 on the right. To fix it, put a 2 on front of the O2 on the left and that should balance it.
Answer:
[tex]\huge \boxed{\mathrm{CH_4+ \boxed{2} O_2 \Rightarrow CO_2 +2 H_2O}}[/tex]
[tex]\rule[225]{225}{2}[/tex]
Explanation:
[tex]\sf CH_4+ O_2 \Rightarrow CO_2 + H_2O[/tex]
Balancing the Hydrogen atoms on the right side,
[tex]\sf CH_4+ O_2 \Rightarrow CO_2 +2 H_2O[/tex]
Balancing the Oxygen atoms on the left side,
[tex]\sf CH_4+ 2O_2 \Rightarrow CO_2 +2 H_2O[/tex]
We need 4 atoms of Oxygen on both sides to balance.
[tex]\rule[225]{225}{2}[/tex]