Write down the bond line structure of the following:
Trans- (or E-) 2-butene

Explanation

To write down the bond line structure of trans-2-butene, we will follow these steps:

### Step-by-Step Solution:

1. **Identify the Structure of 2-Butene**:
- 2-butene is an alkene with four carbon atoms (but- means four) and a double bond between the second and third carbon atoms. The molecular formula is C4H8.

2. **Determine the Position of the Double Bond**:
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