Number of atoms in `558.5` ` g ` `Fe (at.wt.55.85)` is:

Options

A. twice that in 60 g carbon
B. `6.023 xx 10^(22)`
C. half that in 8 g He
D. `558.5xx 6.023 xx 10^(23)`

Answer

A

Explanation

Fe (no. of moles) `= (558.5).(55.85) = 10` moles C (no. of moles) = 60/12 = 5 moles.
(atomic weight of carbon = 12)