Density of States: Approximately How Many States in the Range

Multiple Choice

Density of states: Approximately how many states in the range from 5.0 eV to 5.2 eV are there in a copper bar of volume 5.3 cm³? (h = 6.626 × 10^-34 J ∙ s, ħ = 1.055 × 10^-34 J ∙ s, m_el = 9.11 × 10^-31 kg, 1 eV = 1.60 × 10^-19 J)

A) 5.1 × 10²²
B) 3.2 × 10²²
C) 1.6 × 10²²
D) 8.2 × 10²¹
E) 3.2 × 10²¹