Chemistry, 28.01.2020 16:54 jayy1733

Which of these would indicate a chemical change has occurred? a) salt is dissolved into water. b) a child colors a picture with a crayon. c) solid iron is heated until it turns into a liquid. d) a metal is added to an acid and hydrogen gas is formed.

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Which of these would indicate a chemical change has occurred? a) salt is dissolved into water. b) a...