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Iron (III) oxide is formed when iron combines with oxygen in the air. How many grams of Fe2O3 are formed when 16.7 g of Fe reacts completely with oxygen? A. 12.0 g B. 23.9 g C. 47.8 g D. 95.6 g
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Aug 10, 2021
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Iron (III) oxide is formed when iron combines with oxygen in the air. How many grams of Fe2O3
are formed when 16.7 g of Fe reacts completely with oxygen?
A. 12.0 g
B. 23.9 g
C. 47.8 g
D. 95.6 g
Chemistry
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Michael Kolakowski
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Michael Kolakowski
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The answer is B.
First write a balanced equation, which is
4Fe + 3O2 => 2Fe2O3.
Then divide the grams of Fe by the molar mass of Fe (16.7/55.85).
You now know the number of moles of Fe, so perform dimensional analysis.
(.299*2*159.70)/(4*1) = 23.9 g
Zorg
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Aug 15, 2021
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Zorg
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