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What is the number of occupied states in the energy range ?E = 0.0319 eV that...

What is the number of occupied states in the energy range ?E = 0.0319 eV that is centered at a height of E = 6.23 eV in the valence band if the sample volume is V = 5.33 × 10-8 m3, the Fermi level is EF = 5.05 eV, and the temperature is T = 1430 K?

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