A food item that is left out of the refrigerator turns brown and forms bubbles and gas. What are the signs that this is a chemical reaction? Check all that apply.
*Heat is produced.
*Heat is absorbed.
*Bubbles appear.
*A precipitate forms.
*The color changes.
Answers
Answered by
2
Answer:
A precipitate forms and the colour changes
Answered by
4
Answer:
bubbles appear and the color changes
Explanation:
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