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In the reaction O + O2 -> O3, what is being formed?

Question
In the reaction O + O2 -> O3, what is being formed?
Oxygen gas
Ozone
Carbon dioxide
Water vapor
Answer
Ozone
Detailed Explanation
This reaction, as shown in the chapter, represents the formation of ozone (O3) from a free oxygen atom and a molecular oxygen. — Examisthan.com
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