Calculate the equilibrium concentration of vacancies, nV. per cubic meter in pure copper at 850C. Assume that the energy of formation of a vacancy in pure copper is 1.6eV. (Density of copper =8.96106g3m3. Boltzmann constant =8.62105eV/K, and atomic mass of copper =63.54g/atomic mass.) (Round the final answer to three decimal places.) The equilibrium concentration of vacancies, nv, is 1024 vacancies /m3