1. Germanium (Ge) has a diamond lattice with an atomic density of 4.42x1022 atoms/cm3, while aluminum (Al) is a face-centered cubic with atomic density of 6.02x1022atoms/cm3. a) Calculate the lattice parameter a for Ge and Al. b) Determine the number of atoms/cm2 on the (100), (110), and (111) surfaces for Ge and Al

The size (radius) of an oxygen molecule is about 2.0 ×10−10m. make a rough estimate of the pressure at which the finite volume of the molecules should cause noticeable deviations from ideal-gas behavior at ordinary temperatures (t= 300k ). assume that deviatons would be noticeable when volume of the gas per molecule equals the volume of the molecule itself.