1.The density of solid Fe is 7.87 g/cm3. What volume per atom of Fe?

Question

2.As a solid Fe adopts a body centered cubic unit cell. What is the volume of a unit cell of this metal?

3.What is the edge length of a unit cell of Fe?

Answer 1

volume = mass/density give you the macro measurement. Divide by 6.022E23 to arrive at the volume of 1 atom Fe.

2. multiply by 2 to obtain the volume of a unit cell.

3. Extract the cube root of #2 to get a.