The Number of Atoms in a 2 $\times$ 20 Cm $\times$ 20 Cm Cube of Copper (Molecular Mass 29 and Density

Multiple Choice

The number of atoms in a 2.0 cm $\times$ 2.0 cm $\times$ 2.0 cm cube of copper (molecular mass 29 and density 8920 kg/m³) is

A) 2.3 $\times$ 10²².
B) 1.5 $\times$ 10²⁴.
C) 2.46 $\times$ 10²⁴.
D) 1.5 $\times$ 10²⁷.
E) 2.46 $\times$ 10²⁷.