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Iron(III) oxide reacts with carbon to give iron and carbon
Chapter 6, Problem 54QP(choose chapter or problem)
Iron(III) oxide reacts with carbon to give iron and carbon monoxide.
\(\mathrm{Fe}_{2} \mathrm{O}_{3}(s)+3 \mathrm{C}(s) \longrightarrow 2 \mathrm{Fe}(s)+3 \mathrm{CO}(\mathrm{g})\)
a. How many grams of C are required to react with 16.5 g of \(\mathrm{Fe}_{2} \mathrm{O}_{3}\)?
b. How many grams of CO are produced when 36.0 g of C reacts?
c. How many grams of Fe can be produced when 6.00 g of \(\mathrm{Fe}_{2} \mathrm{O}_{3}\) reacts?
Questions & Answers
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QUESTION:
Iron(III) oxide reacts with carbon to give iron and carbon monoxide.
\(\mathrm{Fe}_{2} \mathrm{O}_{3}(s)+3 \mathrm{C}(s) \longrightarrow 2 \mathrm{Fe}(s)+3 \mathrm{CO}(\mathrm{g})\)
a. How many grams of C are required to react with 16.5 g of \(\mathrm{Fe}_{2} \mathrm{O}_{3}\)?
b. How many grams of CO are produced when 36.0 g of C reacts?
c. How many grams of Fe can be produced when 6.00 g of \(\mathrm{Fe}_{2} \mathrm{O}_{3}\) reacts?
ANSWER:Step 1 of 3:
(a) Here, we are going to find out the amount of C are required to react with 16.5 g of \(\mathrm{Fe}_{2} \mathrm{O}_{3}\)
We know that
\(\mathrm{Fe}_{2} \mathrm{O}_{3}(s)+3 \mathrm{C}(s) \rightarrow 2 \mathrm{Fe}(s)+3 \mathrm{CO}(g)\)
The molar mass of \(\mathrm{Fe}_{2} \mathrm{O}_{3}=159.69 \mathrm{~g} / \mathrm{mol}\)
Given mass = 16.5 g
Thus, the amount of \(\mathrm{Fe}_{2} \mathrm{O}_{3}=16.5 \mathrm{~g} \times 1 / 159.69 \mathrm{~g} / \mathrm{mol}=0.103 \text { moles }\)
We know,
\(\begin{array}{l} \frac{1 \text { mole of } \mathrm{Fe}_{2} \mathrm{O}_{3}}{3 \text { moles of } \mathrm{C}}=\frac{0.103 \text { mole of } \mathrm{Fe}_{2} \mathrm{O}_{3}}{n \text { moles of } \mathrm{C}} \\ \Rightarrow n=0.3099 \text { moles of } \mathrm{C} \end{array}\)
The molar mass of C = 12.01 g/mol
Thus, the amount of C are required to react with 16.5 g of \(\mathrm{Fe}_{2} \mathrm{O}_{3}\)
\(=12.01 \mathrm{~g} / \mathrm{mol} \times 0.3099 \text { moles }=3.72 \mathrm{~g}\)
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