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OpenStudy (anonymous):
A chemical change is a change in the ______ of a substance. a. composition c. temperature b. appearance d. melting point
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OpenStudy (ipwnbunnies):
Hmm...The best answer is composition. A physical change would change the appearance of a substance, to some extent.
OpenStudy (anonymous):
composition... when you burn paper its an chem change since you can not regenerate the ash to make paper the composition has changed in substance
OpenStudy (anonymous):
thank you both!
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