Iron Crystallizes in a Body-Centered Cubic Lattice

Multiple Choice

Iron crystallizes in a body-centered cubic lattice. How many unit cells are in an iron sample whose mass is 1.50 grams? The molar mass of iron is 55.85 g mol^-1.Hint: Use dimensional analysis and the number of atoms per unit cell.

A) 1.80 × 10²¹ unit cells
B) 3.23 × 10²² unit cells
C) 4.04 × 10²¹ unit cells
D) 8.09 × 10²¹ unit cells
E) 1.62 × 10²² unit cells