(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The atomic mass of iron (Fe) is approximately 56 grams per mole.

(a) Assume each iron atom in a bar of iron takes up a volume equal to a sphere of radius 2.35×10-10 m. Calculate the density of iron based on this model.

(b) The actual density of iron is 7870 kg/m^3. Modify the atomic radius in (a) such that the calculated density agrees with the actual value.

2. Relevant equations

Density = mass/(4/3)[tex]\pi[/tex]r^3 ( D=m/V )

3. The attempt at a solution

I figured out a) to be 1.71E3 kg/m^3. However, I can't figure out b).

The new radius is 1.41E-9from what I calculated, but it is not the right answer.

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# Homework Help: Modify the Radius

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