How can you tell that a chemical change has occurred?

Understand the Problem

The question is asking for indicators that signify a chemical change, comparing different statements to identify which one correctly describes a chemical transformation.

Answer

Color change, gas production, precipitate formation, temperature change, odor change, light emission.

Changes indicating a chemical reaction include color change, gas production, formation of a precipitate, temperature change, odor change, and emission of light.

Answer for screen readers

Changes indicating a chemical reaction include color change, gas production, formation of a precipitate, temperature change, odor change, and emission of light.

More Information

These signs indicate that new substances are being formed and the original substances are changing fundamentally.

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