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3 votes
Which is a chemical property of oxygen.

A. It expands when heated

B. It combines to form o2 molecules


C. It is a gas at room temperature

D. It reacts with iron to form rust

User Fiks
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2 Answers

2 votes
I think it's C hope it's right
3 votes
I think the answer is D. I'm sorry if I'm wrong
User Yuriy Rypka
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