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Q: Cold packs are designed to become very cold when activated. When the pack is activated, a chemical reaction occurs to make the temperature of the cold pack decrease. What must be true of this
chemical reaction? (2 points) A) The reaction releases energy to its surroundings. B) The products and reactants have the same amount of energy. C) The products have less energy than the reactants. D) The reaction absorbs energy from its surroundings.
A: C. released or absorbed.
Expert answered|iamhanifah|Points 300|
Question|Rated good
Asked 6/21/2011 7:25:45 AM
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Questions asked by the same visitor
What are nonmetal?
Question
Expert Answered
Updated 315 days ago|9/9/2016 1:12:09 PM
1 Answer/Comment

Nonmetal, substance that does not exhibit such characteristic properties of metals as hardness, mechanical adaptability, or the ability to conduct electricity.

Added 315 days ago|9/9/2016 1:12:09 PM
This answer has been confirmed as correct, not copied, and helpful.
give me a example of a nonmetal
Question
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Updated 5/1/2014 3:19:13 AM
1 Answer/Comment
Examples of nonmetals are: nitrogen,oxygen, helium,sulfur, and chlorine .
Added 5/1/2014 3:19:13 AM
This answer has been confirmed as correct, not copied, and helpful.
Confirmed by jeifunk [5/1/2014 3:42:22 AM]
Which is a chemical property of mercury? (2 points) A) boiling point of -39ºC B) silvery color C) liquid at room temperature D) reacts with oxygen
Question
Expert Answered
Updated 3/23/2014 10:37:13 AM
1 Answer/Comment
Reacts with oxygen is a chemical property of mercury.
Added 3/23/2014 10:37:13 AM
This answer has been confirmed as correct, not copied, and helpful.
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