Answer : The correct option is,
One molecule of methane reacts with two molecules of oxygen to produce one molecule of carbon dioxide and two molecules of water.
One mole of methane reacts with two moles of oxygen to produce one mole of carbon dioxide and 2 moles of water.
Explanation :
The given balanced chemical reaction is,
Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.
The given chemical reaction is a balanced reaction.
By the stoichiometry we can say that,
One molecule of methane reacts with two molecules of oxygen to produce one molecule of carbon dioxide and two molecules of water.
or,
One mole of methane reacts with two moles of oxygen to produce one mole of carbon dioxide and 2 moles of water.