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How can you be certain that a chemical change has occurred?

How can you be certain that a chemical change has occurred?
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3 votes
How can you be certain that a chemical change has occurred?

How can you be certain that a chemical change has occurred?-example-1
asked
User ADJenks
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2 Answers

3 votes
Yeah answer is A there needs to be a new substance
answered
User Lan
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8.5k points
7 votes

Answer:

A.) There is at least one substance that was not present before the change.

answered
User Prasad De Silva
by
7.5k points
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