Glycerin in water diffuses along a horizontal column that has a cross-sectional area of 2.3cm^2. The concentration gradient is 0.028 kg/m^4, and the diffusion rate is found to be 5.8 x 10 ^-15 kg/s find the diffusion coefficient in units of m^2/s.

Answer 1

I get 9.00621 x 10 ^-11 m^2/s but the computer says that is wrong. I used the equation, Diffusion rate = DA (concentration gradient) where A is area and D is what we are looking for.