Number of atoms in 558.5 gram of `Fe(at.wt.ofFe=55.85 gm ol^(-1))` is

Options

A. twice that in 60 g carbon
B. `6.023xx10^(22)`
C. half that in 8 g He
D. `558.5 xx6.023xx10^(23)`

Answer

A

Explanation

(a)` Fc(no. of moles)-(558.5)/(55.85)=10`moles`-10N_A` atoms. No. of moles in 60 g of C-60/12-5 moles -`5N_A` atoms.