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When the oxygen in the air combines with the iron exposed by paint peeling off an old bicycle, a new, red-colored, crumbly substance is formed. Physical or chemical?
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When the oxygen in the air combines with the iron exposed by paint peeling off an old

bicycle, a new, red-colored, crumbly substance is formed.
Physical or chemical?

User Vandershraaf
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1 Answer

6 votes

Chemical. This process is not done physically.

User Alouani Younes
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