An element crystallizes in a body-centered cubic lattice. The edge of the unit cell is 3.13Å , and the density of the crystal is 7.78g/cm3. Calculate the atomic weight of the element. Please help, thanks

Answer 1

3.13 A = 3.13E-8 cm
volume = (3.13E-8)^3 = ?
m = volume x density = ?
bcc is 2 atoms/unit cell.

2 atoms/unit cell*atomic mass/6.02E23 = mass from above.
Solve for atomic mass.