Question

Number of atoms in 558.5gram Fe (at. wt. of Fe = 55.85gmol^–1) is
(a) twice that in 60g carbon
(b) 6.023 × 10²²
(c) half that in 8g He
(d) 558.5 × 6.023 × 10²³.

Answer 1

(a) : Fe (no. of moles) = 5555.88.55 = 10moles C (no. of moles) = 60/12 = 5moles. (atomic weight of carbon = 12)