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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 a iron bar whose dimensions are 2.00 cm * 3.00 cm * 8.00 cm ?

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We have
<br>Mass/Volume = Density
<br>The volume of the iron bar is V = 2 * 3 * 8 cm^3
<br>V = 48 cm^3
<br>Since the density of ...

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Solution will enable you to understand the concepts of concentration and solve similar problems.