Write down the conjugate base of the following: (i) `NH_(4)^(+)`,(ii) HCOOH (iii) `H_(3)O^(+)` `H_(2)NCONH_(3)^(+)`

Explanation

To find the conjugate base of the given acids, we need to understand that a conjugate base is formed when an acid donates a proton (H⁺). Here’s the step-by-step solution for each of the given acids:

### Step 1: Identify the first acid, NH₄⁺
- The first acid is ammonium ion (NH₄⁺).
- When NH₄⁺ donates a proton (H⁺), it becomes NH₃ (ammonia).
- **Conjugate base of NH₄⁺ is NH₃.**

### Step 2: Identify the second acid, HCOOH
...