Which of these is an indication that a chemical reaction has occurred? 1) melting of a substance 2) boiling of a substance 3) formation of a precipitate 4) freezing of a substance

Which of these is an indication that a chemical reaction has occurred?

1) melting of a substance

2) boiling of a substance

3) formation of a precipitate

4) freezing of a substance

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Which of these is an indication that a chemical reaction has occurred? 1) melting of a substance 2) boiling of a substance 3) formation of a precipitate 4) freezing of a substan…

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