Draw the structural formula for the But-2-yne

Explanation

To draw the structural formula for But-2-yne, we will follow these steps:

### Step 1: Identify the number of carbon atoms
The prefix "but-" indicates that there are 4 carbon atoms in the molecule.

### Step 2: Determine the position of the triple bond
The suffix "-yne" indicates that there is a triple bond present in the molecule. The "2-" indicates that this triple bond is located between the second and third carbon atoms.

...