How many moles of O₂ are needed to burn 2.5 moles of CH₃OH?

Question

How many moles of O₂ are needed to burn 2.5 moles of CH₃OH?

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RobertKer 5 years 2021-08-26T20:24:30+00:00 1 Answers 18 views 0

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  1. lethu
    0
    2021-08-26T20:25:43+00:00
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    Answer:

    3.75 moles

    Explanation:

    The chemical equation is 2CH₃OH + 3O₂ -> 2CO₂ + 4H₂O

    2 moles of CH₃OH are burned by 3 moles of O₂

    For 2.5 moles of CH₃OH are burned by x moles of O₂

    Let’s solve for x :

    2*x=2.5*3 => 2*x=7.5 => x=3.75 moles of O₂ are needed to burn 2.5 moles of CH₃OH

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )