Question 3. Acetone is a common reagent in laboratories. Acetone was accidentally spilled on a laboratory countertop which was 0.4m in length. The air stream produced by an exhaust fan flows at 4m/s parallel to the length of the countertop. Temperature and pressure of air were 298K and 1.013105Pa, respectively. The diffusivity of acetone in air under these conditions is 9.3106m2s1. The vapor pressure of acetone at 298K is 3.066104Pa. The viscosity of air at 298K is 1.55105m2s1. In laminar flow (0