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March 24, 2017

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2 SO2 (g) + O2 (g) → 2 SO3­↑
Assuming STP, how many grams of oxygen are needed to produce 19.8 liters of SO3?

  • Chemistry - ,

    When gases are involved you may use a shortcut; i.e., use volumes as if volume = mols.
    19.8 L SO3 x (1 mol O2/2 mols SO3) = ? L O2.
    Then grams = mols x molar mass.

  • Chemistry - ,

    02+2SO2=2SO3
    volume(O2)=19.8L*(1LO2/2LSO3)
    =9.9L of O2

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