What is the oxygen demand for each gram of nitrogen in the following? given that the total oxidation reaction: NH4* + 202 → NO3 + 2H* + H2O 2 NH4+ + 3 02 –Nitroso-bacteria> 2 NO2 + 4H* + 2 H2O 2 NO2 + 02 –Nitro-bacteria> 2 NO3

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