Q72 / 225 · JEE Main 2002 · Chemistry

Number of atoms in $558.5$ gram Fe (at.wt. of $\mathrm{Fe}=55.85 \mathrm{~g} \mathrm{~mol}^{-1}$ ) is

  • Correct answer
    A
    twice that in 60 g carbon
  • B
    $6.023 \times 10^{22}$
  • C
    half that in $8 \mathrm{g} \mathrm{~He}$
  • D
    $558.5 \times 6.023 \times 10^{23}$

Solution

$\mathrm{Fe}($ no. of moles $)=\frac{558.5}{55.85}=10$ moles $C$ (no. of moles $)=60 / 12=5$ moles.

Hence, the correct answer is option: 'A'.

Relevant Questions