A tube has a length of 0.013 m and a cross-sectional area of 8.6 x 10-4 m2. The tube is filled with a solution of sucrose in water. The diffusion constant of sucrose in water is 5.0 x 10-10 m²/s. A difference in concentration of 4.1 x 103kg/mºis maintained between the ends of the tube. How much time is required for 7.9 x 10-13 kg of sucrose to be transported through the tube?