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200 ml of oxygen is collected over water at 18 degree Celsius and standard pressure, what will the volume of the dry oxygen be at STP?

  • chemistry -

    Look up vapor pressure of H2O at 18 C. Call that vp

    Use (P1V1/T1) = (P2V2/T2)
    P1 = 760-vp
    V1 = 200 mL
    T1 = 273 + 18
    P2 = 760
    V2 = ?
    T2 = 273
    Substitute and solve for V2.

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