Write the chemical equation for the chemical reaction shown in the illustration. In the illustration: The black sphere represents a carbon atom. The white sphere represents a hydrogen atom. The grey sphere represents an oxygen atom.

According to the given image, There are two reactants in the reaction. The first reactant contains one atom of carbon and four atoms of hydrogen, so it is a methane molecule and its molecular formula is CH 4 . The second reactant contains two molecules each containing two atoms of oxygen. On the other side, the first product formed is carbon dioxide CO 2 containing one carbon atom and two oxygen atoms. The second product formed is two water molecules 2 H 2 O . It is an example of a combustion reaction, the equation for the same can be written as, CH 4 + 2 O 2 → CO 2 + 2 H 2 O