Answer:
Explanation:
1 mole of iron is 56 grams (rounded)
x mole of iron is 38 grams (given
1/x = 56/38 Cross multiply
56x = 38*1 Divide by 56
x = 38/56
x = 0.679 mols of iron
1 mol of anything = 6.02 * 10^23
0.678 mols of iron = x
1/0.679 = 6.02 *10^23 /x
x = 0.679 * 6.02*10^23
x = 4.09 * 10 ^23
So there are 4.09 * 10^23 atoms of Fe in 38 grams of iron
