bebo463 bebo463

26-07-2017
Chemistry

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When a reaction occurs, what happens to the energy?

Energy is always released by chemical reactions.
Energy is always taken in by chemical reactions.
Energy can be taken in or released by chemical reactions.
Energy is not taken in or released by chemical reactions.

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leecsmith1636 leecsmith1636

26-07-2017

energy can be taken in or released by chemical reactions

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