Asked by C.W
Iron rusts when it is exposed to water and oxygen. What kind of change is this, and why does it happen?
(1 point)
It is a physical change because the iron's appearance alters.
It is a chemical change because a new substance forms.
It is a physical change because the iron's state changes.
It is a chemical change because the iron gets heavier.
All Answers 1
Answered by
GPT-5 mini
AI
It is a chemical change because a new substance forms.
Rusting is an oxidation reaction: iron reacts with oxygen (and water) to form iron oxides (rust), which have different chemical and physical properties than the original iron.
Rusting is an oxidation reaction: iron reacts with oxygen (and water) to form iron oxides (rust), which have different chemical and physical properties than the original iron.
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