Which gas would have the slowest rate of diffusion, assuming that all gases are at the same temperature? A. krypton (atomic mass 83.8 amu) B. argon (atomic mass 39.95 amu) C. xenon (atomic mass 131.3 amu) D. radon (atomic mass 222 amu)

Okay this will take 1 hour okay dont forget me.

Vander waals forces are inter molecular bonds that exist within molecules of the same substance. a water molecule is made up of oxygen and hydrogen atoms which share electrons between each other. the vander waals forces are forces that exist between multitude of different  molecules of water. dipole dipole forces is the type of vander waals force that exist in water. the oxygen atom which is more electronegative pulls the shared electron closer to itself thus generating a partial negative charge while the hydrogen acquire a partial positive charge. these two different charges causes attraction to occur in water molecules.

The answer is d) light rays pass through mirrors at an angle.

Hope you figure it out: )