What is the hallmark of a chemical change?

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asked Dec 8, 2022 165k views

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Klaw · Answer 1 · 2022-12-13T08:41:15+0000

There are five signs that indicate a chemical reaction has occurred: odor, energy change, gas bubbles, precipitate formation, and color change. When any of these changes occur, the reaction is irreversible and cannot be undone.

What is the hallmark of a chemical change?

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