What happens when (give balanced equations):
Ethene combines with hydrogen chloride.

Explanation

To solve the question of what happens when ethene combines with hydrogen chloride, we can break down the process into clear steps and provide the balanced equation.

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactants in this reaction are ethene (C₂H₄) and hydrogen chloride (HCl).

2. **Dissociation of Hydrogen Chloride**:
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