Question

calculate the number of molesof iron in a sample containing 10^22 atoms of iron

Answer 1

6 *$10^{23}$ atoms  = 1 mole of iron  
$10^{22}$ atoms  =  $(\frac{1}{ (6 ) 10^{23} } ) ( 10^{22} ) moles of iron$ = 0.016 moles of iron