Decide whether or not each of the following metals dissolves in 1 {\rm M} {\rm{HNO}}_3. For those metals that do dissolve, write a balanced redox reaction showing what happens when the metal dissolves.
1. \rm Co
Express your answer as a chemical equation. Enter noreaction if there is no reaction. Identify all of the phases in your answer.
2. {\rm Au}
Express your answer as a chemical equation. Enter noreaction if there is no reaction. Identify all of the phases in your answer