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Which piece of evidence indicates that a chemical reaction has occurred? Question 1 options: melting of a substance boiling of a substance formation of a precipitate freezing of a substance
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5 votes
Which piece of evidence indicates that a chemical reaction has occurred?

Question 1 options:

melting of a substance


boiling of a substance


formation of a precipitate


freezing of a substance

User Lukasz
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1 Answer

4 votes
formation of a precipitate
User Niki Yoshiuchi
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