A student wants to reclaim the iron from an 18.0 gram sample of iron (III) oxide, which occurs according to the reaction below: how many gra

Question

A student wants to reclaim the iron from an 18.0 gram sample of iron (III) oxide, which occurs according to the reaction below: how many grams of iron can be reclaimed.

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Doris 4 years 2021-08-11T07:05:03+00:00 1 Answers 42 views 0

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  1. thienthi
    0
    2021-08-11T07:06:36+00:00
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    Answer:

    12.6 g

    Explanation:

    Step 1: Write the balanced decomposition reaction

    2 Fe₂O₃ ⇒ 4 Fe + 3 O₂

    Step 2: Calculate the moles corresponding to 18.0 g of Fe₂O₃

    The molar mass of Fe₂O₃ is 159.69 g/mol.

    18.0 g × 1 mol/159.69 g = 0.113 mol

    Step 3: Calculate the moles of Fe formed from 0.113 moles of Fe₂O₃

    The molar ratio of Fe₂O₃ to Fe is 2:4. The moles of Fe formed are 4/2 × 0.113 mol = 0.226 mol

    Step 4: Calculate the mass corresponding to 0.226 moles of Fe

    The molar mass of Fe is 55.85 g/mol.

    0.226 mol × 55.85 g/mol = 12.6 g

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