(b) Copper crystallises as FCC (face centred cubic). Given that the atomic radius and density of given copper sample are 1.28 x 100 m and 8.98 x 10' kg/m' respectively, cary out the following: a Calculate the mass of the copper sample. T'ake Avogadro's number, NA = 6.023 x 1023 atoms/mole. (i) (ii) If the interatomic planar spacing, d, in the sample above is 2.96 x 1010 m, determine the angle at which the first Bragg reflection will occur from the (111) plane if x-radiation of wavelength 1.52 x 1010 m is used for the analysis. (c) Give two uses of pure copper and two commercial applications of copper alloys.

(b) Copper crystallises as FCC (face centred cubic). Given that the atomic radius and density of given copper sample are 1.28 x 100 m and 8.98 x 10' kg/m' respectively, cary out the following: a Calculate the mass of the copper sample. T'ake Avogadro's number, NA = 6.023 x 1023 atoms/mole. (i) (ii) If the interatomic planar spacing, d, in the sample above is 2.96 x 1010 m, determine the angle at which the first Bragg reflection will occur from the (111) plane if x-radiation of wavelength 1.52 x 1010 m is used for the analysis. (c) Give two uses of pure copper and two commercial applications of copper alloys.