At room temperature the electrical conductivity and the electron mobility for aluminum are 3.8 × 107 (Ω•m)–1 and 0.0012 m 2/V•s, respectively.
(a) Compute the number of free electrons per cubic meter for aluminum at room temperature.
(b) What is the number of free electrons per aluminum atom? Assume a density of 2.7 g/cm3.
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