Question
An iron ore that contains Fe3O4 reacts according to thereactionFe3O4 2C ¡ 3Fe 2CO2We obtain 3.49 g of Fe from the reaction of 75.0 g of theore. What is the percent Fe3O4 in the ore?
Step 1
The molar mass of Fe is 55.85 g/mol and the molar mass of O is 16.00 g/mol. Therefore, the molar mass of Fe3O4 is $3 \times 55.85 \, g/mol + 4 \times 16.00 \, g/mol = 231.54 \, g/mol$. Show more…
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From a 45.0-g sample of an iron ore containing Fe3O4, 1.47 g of Fe is obtained by the reaction: Fe3O4 2C ¡ 3Fe 2CO2 What is the percent of Fe3O4 in the ore?
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An iron ore that contains $\mathrm{Fe}_{3} \mathrm{O}_{4}$ reacts according to the reaction $$ \mathrm{Fe}_{3} \mathrm{O}_{4}+2 \mathrm{C} \longrightarrow 3 \mathrm{Fe}+2 \mathrm{CO}_{2} $$ We obtain $2.11 \mathrm{~g}$ of Fe from the reaction of $75.0 \mathrm{~g}$ of the ore. What is the percent $\mathrm{Fe}_{3} \mathrm{O}_{4}$ in the ore?
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