Question

which statement best describes what happens during a chemical change? choose 1 answer: a the appearance of the material changes, but the substance stays the same. b the identity of the original substance changes. c the material is broken into smaller pieces, but no new substance forms.

Explanation:

To determine the correct answer, we analyze each option based on the definition of a chemical change:

• Option A describes a physical change (e.g., phase change, shape change) where the substance's identity remains the same.
• Option B: A chemical change involves the formation of new substances with different chemical identities. So, the original substance's identity changes as new substances are formed.
• Option C describes a physical change (e.g., breaking a solid into smaller pieces) with no new substance formed.

Answer:

B. The identity of the original substance changes.