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OpenStudy (anonymous):
Which of the following is a chemical change? A. oil floating on water B. the inflation of a car tire C. the melting of gold D. an iron bar rusting
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OpenStudy (anonymous):
D. Iron bar rusting
OpenStudy (anonymous):
D. Iron bar rusting. Be coz once it rusts can't be made proper again it's a irreversible reaction and permanent
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