The label on a bottle of vinegar says it contains 5.002% acetic acid, CH3COOH. The bottle contains 240.0 mL of vinegar. How many grams of acetic acid are in the bottle?
1 mL of water weighs 1 gram. Maybe you are meant to assume the same thing with acetic acid
5.002% of 240 = ?
% means divide by 100 and of means multiply so you can do that on any calculator
+4 
