savannadutton8577 savannadutton8577

22-05-2019
Physics

contestada

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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wolfpackgirl228 wolfpackgirl228

22-05-2019

3.

If the reaction forms a new substance it's a chemical reaction.

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