explain the difference between physical and chemical changes on the basis of changes that take place at the molecular level.
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When a substance undergoes a physical change, its composition remains the same despite its molecules being rearranged. When a substance undergoes a chemical change, its molecular composition is changed entirely. ... Some examples of physical change are freezing of water, melting of wax, boiling of water, etc.
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When a substance undergoes a physical change, its composition remains the same despite its molecules being rearranged. When a substance undergoes a chemical change, its molecular composition is changed entirely. ... Some examples of physical change are freezing of water, melting of wax, boiling of water, etc.
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