Chemistry · 2022
JEE Main · 26 July 2022, Shift 2 · Q61
Hemoglobin contains 0.34 % of iron by mass. The number of Fe atoms in 3.3 g of hemoglobin is (Given: Atomic mass of Fe is 56 u, N_A =6.022 × 10^23…
Hemoglobin contains $\displaystyle 0.34 \%$ of iron by mass. The number of Fe atoms in $\displaystyle 3.3$ g of hemoglobin is
(Given: Atomic mass of Fe is $\displaystyle 56 \mathrm{u}, \mathrm{N}_{\mathrm{A}}=6.022 \times 10^{23} \mathrm{~mol}^{-1}$.)
Official answer
(3)
$\displaystyle 1.21 \times 10^{20}$
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JEE Main 2022 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.