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What molecules are involved in the oxygen cycle?
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What molecules are involved in the oxygen cycle?

User Alvaro Silvino
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Answer:

In the atmosphere, the oxygen is mostly found as free O2 molecules released via photosynthesis. It also exists as ozone (O3), carbon dioxide (CO2), water vapor (H2O), and sulfur or nitrogen oxides.Step-by-step explanation:

User Pungggi
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