[projek_01]

Hello, I have been strugling with a problem in my assignment. The text book and class notes were not really help to me. The question is as follows,

25.7 mg of TiO2 powder is determined to have a surface area (using BET methods) of
35.5 m^2. What is the dispersion of the powder?

The only relavent equation I found from my class notes is that
dispersion=# of surface atoms/# of total atoms

In this case, the total number of atoms can be figured out by using the molar mass of titainium oxide. However, the number of surface atoms remains a mystery to me. Can anyone chime in on this? Thanks