You're asking for the vapor pressure of acetic acid (CH3OOH). However, vapor pressure is temperature-dependent. There isn't a single, fixed value.

Here's what you need to know about vapor pressure of acetic acid:

* It increases with temperature: As the temperature rises, more acetic acid molecules have enough energy to escape the liquid phase and become a vapor.

* You need a specific temperature to find the vapor pressure: To get a numerical value for the vapor pressure of acetic acid, you'll need to specify the temperature you're interested in.

Here are a few ways to find the vapor pressure of acetic acid at a given temperature:

1. Look up the vapor pressure in a table or database: You can find tables that list the vapor pressure of acetic acid at different temperatures in various chemistry handbooks or online resources.

2. Use an Antoine equation: The Antoine equation is a semi-empirical equation that relates vapor pressure to temperature. It requires coefficients specific to the substance (acetic acid in this case). You can find these coefficients online or in chemical engineering textbooks.

3. Use a vapor pressure calculator: Several online tools can calculate the vapor pressure of a substance given its chemical formula and temperature.

Let me know if you have a specific temperature in mind, and I can help you find the vapor pressure of acetic acid at that temperature.