Yes, CH3COOH, which is the chemical formula for acetic acid (vinegar), does show hydrogen.

Here's why:

* The formula itself shows hydrogen: The formula has four hydrogen atoms (H) within it.

* Acetic acid is an acid: Acids are known for containing acidic hydrogen atoms (H+) that can be released in solution.

Structure:

* Acetic acid has a carboxyl group (-COOH) which is where the acidic hydrogen is located.

So, while the formula doesn't explicitly label the hydrogen as "acidic", it's important to remember that CH3COOH contains hydrogen atoms and is an acid.