How many valence electrons are in carbon tetrachloride?

I'm not sure what you question is. If we define valence electrons as the outermost electrons in atoms, then there will be 4 for C and 7 each for Cl or 28 + 4 = 32 but not all of those are involved in bond formation.

Well it says to find valence electrons to make the Lewis dot diagram, I'm not sure if that helps.

OK. There are 32 electrons available to make the Lewis structure for CCl4. Here is a site but do it yourself before you look at the site. The site is just to check yourself.

http://www.chemistry.ccsu.edu/crundwell/Galleries/VSEPR/ccl4.html

To determine the number of valence electrons in carbon tetrachloride (CCl4), follow these steps:

Step 1: Find the valence electron configuration of carbon.
Carbon is in Group 14 of the periodic table, so it has four valence electrons.

Step 2: Determine the number of chlorine atoms.
Carbon tetrachloride (CCl4) contains four chlorine atoms.

Step 3: Calculate the total number of valence electrons.
The formula for carbon tetrachloride (CCl4) indicates that there is one carbon atom and four chlorine atoms. So, add the number of valence electrons of carbon (4) to the number of valence electrons for each chlorine atom (7).
4 (from carbon) + 4 * 7 (from chlorine) = 4 + 28 = 32 valence electrons.

Therefore, carbon tetrachloride (CCl4) contains 32 valence electrons.