Number of atoms in 558.5 gram Fe

• Stoichiometry

Number of atoms in 558.5 gram Fe (atomic weight of Fe = 55.85 g mol^–1) is

1. twice that in 60 g carbon
2. 558.5 × 6.023 × 10²³
3. half that in 8 g He
4. 6.023 × 10²²

Answer

Number of atoms = 558.5/55.85 = 10 mol

Number of carbon = 60/12 = 5 mol

The correct option is A.