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27 June, 13:07

how many moles of 02 are required to react completely with 6.9 moles C6H14, express your answer using two significant integers

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  1. 27 June, 16:27
    0
    About 66 moles

    Explanation:

    1. Chemical equation

    The reaction of C₆H₁₄ with O₂ is the combustion of an hydrocarbon. Such reactions yield CO₂ and water.

    The chemical equation is:

    C₆H₁₄ + O₂ → CO₂ + H₂O

    Which when balanced is:

    2C₆H₁₄ + 19O₂ → 12CO₂ + 14H₂O

    2. Mole ratio

    The coefficients on the balanced chemical equation tell the relative amounts of each substance, reactants and products, that participate on the chemical reaction.

    19 moles of O₂ react with 2 moles of C₆H₁₄

    (19 mol O₂ / 2 mol C₆H₁₄) * 6.9 mol C₆H₁₄ = 65.55 mol O₂

    Round to two significant figures: 66 mol of O₂ ← answer
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