Calculate the number of iron atoms in 53 g of iron

53 g Fe* (1 mol Fe/ 55.8 g Fe)= 0.95 mol Fe.

0.95 mol Fe* (6.02*10^23 Fe atoms/ 1 mol Fe)= 5.7*10^23 Fe atoms.

Note that the units cancel out so you get the answer.

The final answer is 5.7*10^23 Fe atoms.

Hope this helps~

Ithink 2 is the correct