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5 votes
What is ozone?

-dissolved oxygen
-the main catalyst in photosynthesis
-a type of oxygen
-a form of calcium carbonate

User Afitnerd
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2 Answers

6 votes
I believe that the answer is -a type of oxygen
What is ozone? -dissolved oxygen -the main catalyst in photosynthesis -a type of oxygen-example-1
User Zenadix
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I THINK its the last one but im not sure
User Qweruiop
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