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(17 points) Calculate the number of vacancies per cubic meter in iron at 855C. The energy for vacancy formation is 1.08eV/ atom. Furthermore, the density

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(17 points) Calculate the number of vacancies per cubic meter in iron at 855C. The energy for vacancy formation is 1.08eV/ atom. Furthermore, the density and atomic weight for Fe are 7.65g/cm3 and 55.85g/mol, respectively. Then, assuming the same vacancy formation energy, calculate the number of vacancies per cubic meter in iron at 25C, compare it with the answer of 855C by ratio

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