Determining the density of Silicon

[weston_sagle]

Homework Statement

There are 8 atoms in a unit cell of Si. Silicon has an atomic weight of 28.09 and a lattice constant equal to 5.43 A. Determine the density of silicon/

Homework Equations

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The Attempt at a Solution

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[weston_sagle]

Figured it out.
5.43 is in angstroms, which is 10^-8 cm.
So density is atoms for cm^3

so 8/(5.43x10^-8)^3 = 4.99x10^22/cm^3

Simple as that.