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28 November, 15:16

How many moles of O2 are needed to react with 8.95 moles of Al?

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Answers (2)
  1. 28 November, 15:37
    0
    We need 6.71 moles of O2 to react with 8.95 moles of Al

    Explanation:

    Step 1: Data given

    Number of moles of Al = 8.95 moles

    Step 2: The balanced equation

    4Al + 3O2 → 2Al2O3

    Step 3: Calculate moles number of moles O2 needed to react with Al

    For 4 moles Al we need 3 moles O2 to produce 2 moles Al2O3

    For 8.95 moles Al we need 3/4 * 8.95 = 6.71 moles O2

    There will 8.95/2 = 4.48 moles Al2O3 be produced

    We need 6.71 moles of O2 to react with 8.95 moles of Al
  2. 28 November, 15:45
    0
    6.71 moles of O₂

    Explanation:

    When the reactans are oxygen and aluminum, you produce aluminum oxide by this reaction:

    4 Al + 3O₂ → 2Al₂O₃

    The stoichiometry indicates that 4 moles of Al reacts with 3 moles of O₂.

    Let's make a rule of three:

    If 4 moles of Al reacts with 3 moles of O₂

    Then, 8.95 moles of Al will react with (8.95. 3) / 4 = 6.71 moles
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