Question

balanced chemical equations quick check
which statement best describes the law of conservation of mass? (1 point)
○ matter cannot be created or destroyed in a chemical reaction.
○ chemical symbols are used to show atom balance before and after a reaction.
○ reactants in a chemical reaction rearrange to form a new substance or substances.
○ reactants and products cannot escape from a closed system

Explanation:

The law of conservation of mass states that in a chemical reaction, matter is neither created nor destroyed. The first option directly states this. The second option is about using chemical symbols for atom balance (related to balancing equations, not the law itself). The third option describes chemical reactions in general (rearrangement to form products, not mass conservation). The fourth option is about a closed system preventing escape, not the fundamental law of mass conservation.

Answer:

A. Matter cannot be created or destroyed in a chemical reaction