YOu should use the Graham's Law of Diffusion
R1/ R2 = √(M2/ M1)
Helium is R1, air is R2.
I'm not sure if your professor gives density or molar mass for this problem? You need M2 and M1 to solve for the rates of diffusion.
Answer:
Every germanium atom is tetrahedrally linked to four sulphur atoms, with an interatomic distance of 2.19A. The angle between the two sulphur bonds is 103°.
hope this helps
Electrons have a mass of 1/1836
Hope that helps you!
SI unit of length - meters
