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OpenStudy (anonymous):
Both slicing a tomato and a chemical change such as burning toast cannot be reversed. However, why is slicing a tomato still considered only a physical change?
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OpenStudy (theeric):
Hi! I didn't feel fully qualified to answer this well, but I found a good source with a direct answer: http://chemwiki.ucdavis.edu/Analytical_Chemistry/Qualitative_Analysis/Chemical_Change_vs._Physical_Change
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