Which of these reactions is an example of nitrogen fixation? A) 2N₂O → 2N₂ + O₂ B) NH₃ + H₂O → + OH^- C) N₂ + O₂ → 2NO D) 2NO₂ + H₂O → HNO₂ + HNO₃ E) 2NO + O₂ → 2NO₂

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Nitrogen fixation is the process of converting atmospheric nitrogen (N2) into a usable form, such as ammonia or nitrate. Option C involves the conversion of N2 and O2 into nitric oxide (NO), which is an example of nitrogen fixation. The other options do not involve the conversion of atmospheric nitrogen into a usable form.

Which of These Reactions Is an Example of Nitrogen Fixation