The density of totally crystalline nylon 6,6 at room temperature is 1.213 g/cm3. Also, at...

The density of totally crystalline nylon 6,6 at room temperature is 1.213 g/cm3. Also, at room temperature the unit cell for this material is triclinic with the following lattice parameters:

a = 0.497 nm α = 48.4°

b = 0.547 nm β = 76.6°

c = 1.729 nm γ = 62.5°

If the volume of a triclinic unit cell, is a function of these lattice parameters as

determine the number of repeat units per unit cell.