When carbon an oxygen combine chemically, the mass of the product

The correct answer is option (2).

Explanation:

According to Law of Conservation of Mass , mass can neither be created nor be destroyed.

In a balanced chemical equation of reaction , the mass of the reactant is always equal to the mass of the products. As we can observe this law in the chemical reaction between carbon and oxygen.

Total mass of reactant = 12 g/mol + 32 g/mol = 44 g/mol

Total mass of products = (12 g/mol + 2 × (16 g/mol)) = 44 g/mol

Since,the law of conservation of mass is justified by the above reaction .Hence ,the correct answer is option (2).