Write a balanced chemical equation for the preparation of
Ethene from bromoethane.

Explanation

To write a balanced chemical equation for the preparation of ethene from bromoethane, follow these steps:

### Step 1: Identify the reactants and products
- **Reactant**: Bromoethane (C2H5Br)
- **Product**: Ethene (C2H4)
- **Other reactant**: Potassium hydroxide (KOH)

### Step 2: Write the unbalanced chemical equation
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