Answer: [tex]3.9\times 10^{23}[/tex] iron atoms
Explanation:
According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
[tex]1 molecule of [tex]Fe_2O_3[/tex] contains= 2 atoms of iron
[tex]1 mole of [tex]Fe_2O_3[/tex] contains=[tex]2\times 6.023\times 10^{23}=12.05\times 10^{23}[/tex] atoms of iron
thus 0.32 moles of [tex]Fe_2O_3[/tex] contains=[tex]\frac{12.05\times 10^{23}}{1}\times 0.32=3.9\times 10^{23}[/tex] atoms of iron
Thus the sample would have [tex]3.9\times 10^{23}[/tex] iron atoms.
