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14 January, 07:41

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

A. melting of a substance

B. boiling of a substance

C. formation of a precipitate

D. freezing of a substance

Answers (2)
  1. S
    14 January, 08:58
    0
    I believe the answers is C
  2. I
    14 January, 09:59
    0
    c) formation of a precipitate
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