A Substance Is Allowed to Diffuse Along a 10-Cm Length

question 82

Multiple Choice

A substance is allowed to diffuse along a 10-cm length of tubing filled with water.The cross section of the tube is 5.3 cm².If the diffusion coefficient is 5.0 × 10¯¹⁰ m²/s,and 6.5 × 10¯¹⁴ kg is transported along the tube in 16 s,what is the difference in the concentration levels of the substance at the two ends of the tube?

• A)3.9E-1 kg/m³
• B)4.3E-2 kg/m³
• C)1.5E-3 kg/m³
• D)8.1E-4 kg/m³

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