Sucrose is allowed to diffuse along a 9.0 cm length of tubing filled with water. The tube is 6.0 cm2 incross-sectional area. The diffusion coefficient is equal to 5.0*10-10 m2/s, and 8.0 * 10-14kg is transported along the tube in 19s. What is the difference in the concentration levels of sucrose at the two ends of the tube?