I think I can balance the equation, but I am having trouble completeing the equations. Help please

Ag + H2O = ? AgO + H2 is this right?

Ag + HCl = AgCl + H is this right?

Ag + Au(NO3)3 = Ag(NO3)3 + Au is this right?

I do not understand how to complete these equations I am really just guessing from looking at other equations, but I do not know what the formula is for solving these problems. Can you help me?