The document describes a redox reaction between H1N5O-23 and H12S-2 that produces N2O-2, S0, and H12O-2. Nitric acid acts as the oxidizing agent by gaining electrons and sulfur acts as the reducing agent by losing electrons. The overall balanced redox reaction shown is 2HNO3 + 3H2S → 2NO + 3S + 4H2O.