A compound prepared as a model of hemoglobin is 4.6% iron by mass. Calculate the molar mass of compound aproximately.?
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Dunno what to do.
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Answer:
4.6% by mass means that 100 g of the compound contains 4.6 grams of Fe Calculate the moles of Fe in 4.6 grams: 4.6 g / 55.8 g/mol = 0.082 mol Fe Now, if you assume that each molecule of the compound contains 1 mole of Fe, then 100 g of the compound = 0.082 mole of the compound. So, the molar mass is 100 g / 0.082 mol = 1210 g/mol. With 2 significant figures, the molar mass is 1200 g/mol.
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