We do not know. We have not been given the solubility of oxygen in water at a given temperature nor have we been given the Henry's laws constant. We also do not know whether you mean 1 atmosphere of air, or 1 atmosphere of oxygen.
Erm, I think when they are little. When they are just born.
Answer:
Sun and the stars, nothing humans don't use fusion at all
Explanation:
SO2 this is my answer
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