[sun725]

I have this task that I had to solve. I am going to translate it as good as I can from the original language:

The diffusion coefficient of Piroxicam in aqueous solution is 5,45*10^-10 m²s^-1 at 25 C. The Viscosity of water at 25 C and 37 C is respectively 8,91*10^-4 Pa s and 6,92*10^-4 Pa s

I used the following formulas in order to find the diffusion coefficient:
R=kT/6πηD and got 4,42*10^-10 m

Then
D=kT/6πηR and got 7,42*10^-10 m² s^-1

However, once checking for my answer I saw that the last answer was correct but they also included this answer: 4,45*10^-4 cm² min^-1
How did they achieve this answer? I hope someone can help me.

Thanks in advance!

[Borek]

The diffusion coefficient of Piroxicam in aqueous solution is 5,45*10^-10 m²s^-1 at 25 C

Something is off. Not sure what you are calculating if the diffusion coefficient is given

[sun725]

Forgot this part, I am sorry:
Calculate Piroxicams diffusion coefficient in aqueous solution at 37 C under the assumption that the solubility has the same viscosity as pure water.

Hope it makes sense now?

[mjc123]

Assuming your answer is right, what do you get if you convert the units to cm² min^-1?