The density and associated percent crystallinity for two polytetrafluoroethylene materials are as follows: rho(g/cm3) crystallinity (%) 2.104 51.1 2.280 76.9 (a) Compute the density of totally crystalline polytetrafluoroethylene. rhoc = g/cm3 (b) Compute the density of totally amorphous polytetrafluoroethylene. rhoa = g/cm3 (c) Determine the percent crystallinity of a specimen having a density of 2.27 g/cm3. % crystallinity =