Question

If the vinegar has a density of 1.5g cm3. What is the molarity of CH3 COOH in vinegar

Answer 1

density = 1,5 g/cc so 1000 cc has a mass of 1500 grams

You don't list the percent that is CH3COOH so you don't know how much is vinegar and how much is water.
1500 g x (percent/100) = grams pure CH3COOH.
Then grams pure CH3COOH/60 = ? Molarity.