Haemoglobin contains 0.34 % of iron by mass. The number of Fe atoms in 3.3 g of haemoglobin is .....

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Haemoglobin contains 0.34 % of iron by mass. The number of Fe atoms in 3.3 g of haemoglobin is
(Given : Atomic mass of Fe is 56 u, NA=6.022× 10^23 mol^−1)

(A)  1.21 × 10^5  (B) 12.0 × 10^16 (C) 1.21 × 10^20 (D) 3.4 × 10^22



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