GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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4 moles Fe
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6 moles Fe
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9 moles Fe
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2 moles Fe
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Detailed explanation-1: -The equation requires the use of the mole concept. So, we need to find out how many moles of each element are in our sample. Fe2O3+3H2=2Fe+H2O So, 6 moles of H2 are needed to make 2 moles of Fe.
Detailed explanation-2: -In the reaction Fe2O3+3CO→2Fe+3CO2 F e 2 O 3 + 3 C O → 2 F e + 3 C O 2, 10 moles of solid iron and 15 moles of carbon dioxide are produced from 5 moles of iron (III) oxide and 15 moles of carbon monoxide (CO) .
Detailed explanation-3: -16 mol of CO will be used to produce = 23×16 = 10.67 mol of Fe.
Detailed explanation-4: -Fe2O3 has a molecular weight of 62.4 grams per mole. Therefore, the required moles of Fe2O3 to produce 645 grams of Fe is 22.9 grams.
Detailed explanation-5: -So for every mole of H2 you will form a mole of water, assuming you have sufficient oxygen to react with it all. The atomic weight of hydrogen atoms is 1, but the molar mass of diatomic H2 is 2 g/mol. Therefore, 8 g of H2 is 4 moles. Therefore you will form 4 moles of water.