# Density and Number of Atoms

The Density is 7.87g/cm^3 , and the average mass for a single iron atom is 9.28*10^-23g .

How many iron atoms are present in an iron bar whose dimensions are 2.00 cm * 3.00 cm * 8.00 cm ?

https://brainmass.com/chemistry/stoichiometry/density-number-atoms-7975

#### Solution Preview

We have

Mass/Volume = Density

The volume of the iron bar is V = 2 * 3 * 8 cm^3

V = 48 cm^3

Since the density of iron is ...

#### Solution Summary

Solution will enable you to understand the concepts of concentration and solve similar problems. How many iron atoms which are present in an iron bar whose dimension are 2.00cm * 3.00 cm * 8.00 cm are determined.

$2.49