Which best describes a chemical reaction that follows the law of conservation of matter? group of answer choices
a. the reactants have the same mass as the products.
b. the products conserve all physical properties of the reactants.
c. the products conserve all chemical properties of the reactants.
d. the reactants have the same density as the products.

a. The reactants have the same mass as the products best describes the chemical reaction that follows the conservation of matter.

The product cannot conserve all physical properties as that of the reactant. The product cannot restore all the chemical properties as that of the reactant as the product is formed by the combination of two or more reactant. The reactants have more density than that of the products. The conservation of mass suggests that matter can not be formed nor it can be destroyed so in a chemical reaction the total mass of reactant and the product must remain the same before and after the reaction. The number of atoms in the reactant remains same before and after the chemical reaction.

Hence, option a. The reactants have the same mass as the products is the correct option.

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