Assume that when the compound Cr2O3 evaporates, it forms monoatomic gaseous Cr atoms and diatomic gaseous O atoms, and that the oxygen partial pressure is higher than the Cr pressure. Assume further t

Assume that when the compound Cr2O3 evaporates, it forms monoatomic gaseous Cr atoms and diatomic gaseous O atoms, and that the oxygen partial pressure is higher than the Cr pressure. Assume further that Cr2O3 can become non-stoichiometric through the formation of fully ionized oxygen and metal vacancies. i) Using these assumptions, determine the partial pressure of oxygen where the compound is stoichiometric. ii) With reference to the stoichiometric pressure, explain the range of partial pressures where compound will be an n-type and a p-type conductor.