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All three questions please. The organic content of a wastewater is found to be as follows: C, 72 mg/I; H, 10 mg/I; 0, 20 mg/I;

All three questions please.

The organic content of a wastewater is found to be as follows: C, 72 mg/I; H, 10 mg/I; 0, 20 mg/I; and N, 8 mg/1. (a) Write an empirical molecular formula for the organic material normalized to one mole of organic N. (b) Calculate the COD of the wastewater. (c) Write an electron-equivalent reduction half-reaction for the material.

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