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A tube has a length of 0.028 m and a cross-sectional area of 3.4 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 2.7 x 10-3 kg/m3 is maintained between the ends of the tube. How much time is required for 5.6 x 10-13 kg of sucrose to be transported through the tube?

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