Chemistry

An element crystallizes in a body-centered cubic lattice. The edge of the unit cell is 3.5 Angstrom, and the density of the crystal is 7.39g/cm^3. Calculate the atomic weight of the element. A= ? g/mol

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  1. 95.4g/mol

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  2. The bcc has two atoms/unit cell.
    The edge is 3.5 x 10^-8 cm = a
    Volume = a3 = 3.5 x 10^-8)^3 cc
    mass = volume x density
    mass = a3 x 7.49 g/cc = xx
    2atoms/unit cell x atomic mass/6.022 x 10^23 = xx mass
    Solve for atomic mass.

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  3. I made a typo. The density is 7.39, not 7.49 g/cc.

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