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February 28, 2015

Homework Help: biology

Posted by ballamoney1 on Thursday, April 15, 2010 at 11:40am.

Which of the following is true about the relationship between energy and chemical reactions?

Activation energy is required for a chemical reaction to occur.
Activitation energy is not necessary in a chemical reaction which releases energy.
Chemical bonds are always broken by energy absorption in a chemical reaction.
Energy-absorbing reactions don't occur in chemical reactions.

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