Some Basic Concepts Of Chemistry

Hemoglobin contains \(0.34 \%\) of iron by mass. The number of Fe atoms in \(3.3 \mathrm{~g}\) of hemoglobin is

(Given: Atomic mass of Fe is \(56 \,\mathrm{u}, \mathrm{N}_{\mathrm{A}}=6.022 \times 10^{23} \mathrm{~mol}^{-1}\).)