Gold does not react with either nitric acid or hydrochloric acid but with a combination of both called aqua regia. Identify the oxidizing agent in the following equation:
Au(s) + 4 H+(aq) + NO3-(aq) + 4 Cl-(aq) → [AuCl4]-(aq) + 2 H2O(l) + NO(g)
◦ Au
◦ H+
◦ NO3-
◦ Cl-
◦ NO3- and H+