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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|
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Asked 6/21/2011 7:25:45 AM
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What are nonmetal?
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Updated 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 9/9/2016 1:12:09 PM
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give me a example of a nonmetal
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Updated 5/1/2014 3:19:13 AM
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Examples of nonmetals are: nitrogen,oxygen, helium,sulfur, and chlorine .
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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
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Reacts with oxygen is a chemical property of mercury.
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