Answer:
[tex]5.12*10^2^3[/tex] atoms
Explanation:
[tex]0.85 moles Fe*\frac{6.022*10^2^3}{1 mole Fe} =5.12*10^2^3[/tex]
Use dimensional analysis to convert to moles by putting the moles of Fe (iron) on top and multiply by Avogadro's constant to cancel out moles and be left with atoms.