Number of atoms in 558.5 gram Fe is

• Atomic Structure

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. half that in 8 g He
3. 6.023 × 10²²
4. 558.5 × 6.023 × 10²³

Solution

Number of moles in 55.85 g of Fe = 1

Number of moles of 558.5 g of Fe = 10

Number of atoms in 1 mole = 6.023 x 10²³ (Avogadro's Number)

Atomic weight of carbon = 12 g/mol

Number of moles in 60 g of carbon = 5

10 moles of Fe has two times atoms than 5 moles of C.

The correct option is A.