Answer:
Option D. The carbon dioxide on the side needs a 2 in front of it in order for it to be balanced.
Explanation:
In this chemical reaction, two methane molecules react with four molecules of oxygen produces two molecules of carbondioxide and four water molecules. In the above equation, there are two carbon atoms in the reactant while one carbon atom is present in the product so for balancing the equation, 2 is put in front of carbondioxide in the product.
