I need help with the second part of the problem where is asks to determine the mass of the acetic acid. Do I use the chemical equation for the acetic acid or something else.

During this experiment you will use 50. mL of 15% acetic acid solution. The density of 15% acetic acid solution is 1.02 g/mL. Use this value to calculate the mass of 50. mL of 15% acetic acid solutionThe solution is 15% acetic acid and 85% water. Use the calculated mass of 50. mL of 15% acetic acid solution (from pre-lab question 2) to determine the mass of just the acetic acid.