Compelete and balance the following equations:
(i). `Cu(OH)_2+NH_4NO_3+NH_4OHto…+H_2O`
(ii). `Au+HCl+HNO_3to…+…+H_2O`
(iii). `Ag_2S+2CuCl_2+2"Hg" to…+…S+2Ag`

Explanation

Let's solve and balance the equations step by step.

### (i) Equation: `Cu(OH)2 + NH4NO3 + NH4OH → ... + H2O`

**Step 1: Identify Reactants and Products**
- Reactants: Copper(II) hydroxide (Cu(OH)2), Ammonium nitrate (NH4NO3), Ammonium hydroxide (NH4OH).
- Products: A complex of copper with ammonia and water.

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