Posted by **HELp** on Wednesday, April 28, 2010 at 6:40pm.

The density of an unknown metal is 8.94 g/cm^3 and its atomic radius is 0.126 nm . It has a face-centered cubic lattice. Find the atomic weight of the unknown metal.

- Chem -
**DrBob222**, Wednesday, April 28, 2010 at 8:52pm
4*radius = sqrt(2)*a

solve for a. I recommend converting radius to cm (from nm).

a is the length of a side of the crystal; therefore, a^3 will be the volume of the cube in cc.

mass of the unit cell = volume x density.

Substitute mass into

mass = 4unitcells*molar mass/6.022 x 10^23. and solve for molar mass.

- Chem -
**amy**, Tuesday, September 11, 2012 at 2:31pm
60.9

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