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Problem 131 Hard Difficulty

Hemoglobin is 6.0$\%$ heme $\left(\mathrm{C}_{34} \mathrm{H}_{32} \mathrm{FeN}_{4} \mathrm{O}_{4}\right)$ by mass. To remove the heme, hemoglobin is treated with acetic acid and
$\mathrm{NaCl},$ which forms hemin $\left(\mathrm{C}_{34} \mathrm{H}_{32} \mathrm{O}_{4} \mathrm{O}_{4} \mathrm{FeCl}\right) . \mathrm{A}$ blood sample from a crime scene contains 0.65 $\mathrm{g}$ of hemoglobin. (a) How many grams of heme are in the sample? (b) How many moles of heme?
(c) How many grams of Fe? (d) How many grams of hemin could be formed for a forensic chemist to measure?


$\mathrm{m}($ heme $)=0,039 \mathrm{g}$
$\mathrm{n}($ heme $)=6,33^{*} 10^{-5} \mathrm{mol}$
$\mathrm{m}(\mathrm{Fe})=0,0035 \mathrm{g}$
$\mathrm{m}($ hemin $)=0,041 \mathrm{g}$


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Video Transcript

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