What does the law of conservation of mass say?

a. the mass of the products in a chemical reaction is equal to the mass of the reactants
b. the mass of the reactants is greater than the mass of the products and a chemical reaction
c. the mass of the reactants is less than the mass of the products in a chemical reaction
d. the mass of the products in a chemical reaction is unrelated to the mass of the reactants

A) the mass of product in a chemical reaction is equal to the mass of the reactant.

Explanation:

Law of conservation of mass:

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

Explanation:

This law was given by french chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

For example:

In given photosynthesis reaction:

6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂

there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.

yes

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