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Which of these is an indication that a chemical reaction has occurred? A. Freezing of a substance B. Boiling of a substance C. Melting of a substance D. a change in color of a substance
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Which of these is an indication that a chemical reaction has occurred?

A. Freezing of a substance
B. Boiling of a substance
C. Melting of a substance
D. a change in color of a substance

User CocoBagarre
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D. a change in color of a substance

User Jojeck
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