What is the mass of a sample of iron that has 5.00 × 10²² unit cells, if the iron crystallizes in a body-centered cubic lattice? The molar mass of iron is 55.85 g mol^-1.Hint: Use dimensional analysis and the number of atoms per unit cell.

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In a body-centered cubic lattice, there are 2 atoms per unit cell. First, calculate the number of moles of iron atoms: (5.00 × 10^22 unit cells) × (2 atoms/unit cell) × (1 mol/6.022 × 10^23 atoms) = 0.166 mol. Then, calculate the mass: 0.166 mol × 55.85 g/mol = 9.27 g.

What Is the Mass of a Sample of Iron That