QJEEM22Ch3aaa: JEE Main 2022 Chemistry - Class 11 JEEM22Ch3aaa Solution: Hemoglobin contains 0.34 % of iron by mass. The number of Fe…

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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 $56 u, N_{A} = 6.022 \times 10^{23} {mol}^{- 1}$ .)

Accepted Answer

According to the question,

100 g

of hemoglobin contains

0.34 g

of iron

3.3 g

of hemoglobin contains

\frac{0.34}{100} \times 3.3 g

of iron

moles of

Fe = \frac{0.34 \times 3.3}{100 \times 56} = \frac{N}{N_{A}}

N=\frac{0.34 \times 3.3 \times 6.022 \times 10^{23}}{100 \times 56}

= 1.21 \times 10^{20}

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