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Chemistry
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jwnjd:
Which of the following is a physical change? A. a copper skillet tarnishing B. the sublimation of dry ice C. an iron bar rusting D. oil floating on water
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bm717:
What do you know from the choices that are chemical changes?
NarutoandSasuke:
It's c.
Vocaloid:
iron bar rusting would be a chemical change, the iron (fe) is being converted to iron oxide
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