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| produces new substances by changing the way in which atoms are arranged |
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| are the substances present at the beginning of a chemical reaction |
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| are the substances formed by a chemical reaction |
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| may form when chemicals in two liquids react |
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| is a substance that increases the rate of a chemical reaction but is not itself consumed in the reaction |
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| law of conservation of mass |
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| states that in a chemical reaction atoms are neither created nor destroyed |
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| indicate how many molecules take part in the reaction |
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| the energy associated with bonds |
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| a reaction in which energy is released |
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| a reaction in which energy is absorbed |
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| plants absorb energy from sunlight to turn carbon dioxide and water into oxygen and glucose, which is a type of molecule |
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| living cells obtain energy from glucose molecules |
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