Which best describes the law of conservation of mass?

a: the coefficients in front of the chemicals in the reactants should be based on the physical state of the products.
b: products in the form of gases are not considered a part of the total mass change from reactants to products.
c: when reactants contain both a solid and a liquid, the solid counts toward the overall mass and the liquid does not.
d: the mass of the reactants and products is equal and is not dependent on the physical state of the substances.

Option (D) is the correct answer.

Explanation:

Law of conservation of mass states that mass of reactant species will always be equal to the mass of product species. As mass can neither be created nor it can be destroyed but it can only be transformed from one place to another.

Also, mass does not on the physical state of both reactants or products.

For example,  

Mass of reactants will be as follows.

Mass of sodium = 23 g/mol

Mass of chlorine = 35 g/mol

Total mass of reactants = (23 + 35) g/mol = 58 g/mol

On the other hand, mass of product will be as follows.

 Mass of NaCl = mass of sodium + mass of chlorine

                        = (23 + 35) g/mol

                        = 58 g/mol

Thus, we can conclude that the mass of the reactants and products is equal and is not dependent on the physical state of the substances.  

Option (D) is the correct answer.

Explanation:

Law of conservation of mass states that mass of reactant species will always be equal to the mass of product species. As mass can neither be created nor it can be destroyed but it can only be transformed from one place to another.

Also, mass does not on the physical state of both reactants or products.

For example,  

Mass of reactants will be as follows.

Mass of sodium = 23 g/mol

Mass of chlorine = 35 g/mol

Total mass of reactants = (23 + 35) g/mol = 58 g/mol

On the other hand, mass of product will be as follows.

 Mass of NaCl = mass of sodium + mass of chlorine

                        = (23 + 35) g/mol

                        = 58 g/mol

Thus, we can conclude that the mass of the reactants and products is equal and is not dependent on the physical state of the substances.  

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