What is an indication a chemical reaction has occurred? A.) Formation of gas B.) Boiling of a substance C.) Melting of a substance D.) Freezing of a substance

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asked Jun 4, 2019 129k views

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Christopher Bradford · Answer 1 · 2019-06-09T08:11:00+0000

I believe the answer is A. Formation of gas. I found this answer by eliminating the rest because they only clearly show physical changes in the substance. So, I assumed the substance forming a gas would be due to a chemical change.

What is an indication a chemical reaction has occurred? A.) Formation of gas B.) Boiling of a substance C.) Melting of a substance D.) Freezing of a substance

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