Question

matter interactions unit test
how does a balanced chemical equation demonstrate the law of conservation of mass?
(1 point)
it shows that all compounds remain bonded after the reaction
it shows that only physical changes follow the law of conservation of mass
it shows that the properties of the elements stay the same after the reaction
it shows that no atoms have been gained or lost during the reaction

Explanation:

The Law of Conservation of Mass states that mass is neither created nor destroyed in a chemical reaction. A balanced chemical equation has the same number of each type of atom on both the reactant and product sides. This equality of atom counts means no atoms are gained or lost during the reaction, which is in line with the Law of Conservation of Mass.

• The first option is incorrect because compounds can break apart and form new ones in a reaction.
• The second option is wrong as both physical and chemical changes follow the Law of Conservation of Mass.
• The third option is incorrect because the properties of elements can change when they form compounds in a reaction.

Answer:

it shows that no atoms have been gained or lost during the reaction