Write the resonance structures of `(1) CH_3 COO^(Ө)` and `(2) CH_2 = CH - CHO`. Indicate the relative stability of the contributing structures.

Explanation

### Step-by-Step Solution:

**1. Resonance Structures of CH₃COO⁻ (Acetate Ion)**

- **Structure 1**: The first resonance structure of acetate ion is as follows:
- The carbon atom (C) is bonded to three hydrogen atoms (H) and one oxygen atom (O) with a single bond. This oxygen atom carries a negative charge (O⁻).
- The carbon atom is also double-bonded to another oxygen atom (O) which is neutral.

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