Copper Has a Mass Density of 8 $\times$ 10²⁸ M^-3
B)3 $\times$

Multiple Choice

Copper has a mass density of 8.93 g/cm³ and its molar mass is 63.55 g.If each copper atom contributes one free electron,the carrier density is

A) 8.46 $\times$ 10²⁸ m^-3
B) 3.12 $\times$ 10²⁸ m^-3
C) 4.15 $\times$ 10²⁸ m^-3
D) 6.48 $\times$ 10²⁸ m^-3
E) None of these is correct.