You are missing information. With what you give it is possible to calculate the mass of the solution: 1.002 g/mL x 9.86 mL = 9.88 g of solution. You need to know the molarity of the solution to do any more than that.
Calculate The Percent Of Acetic Acid In The Vinegar. (The Density Of Vinegar Is 1.002 G/ml.) Volume Is 9.86 Ml?
