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A liquid was analyzed to be 54.5% C, 9.10% H, and 36.4% O. An empty flask, whose mass was 45.32 g, when filled with the vapor of the liquid at 735mm Hg and 99.2°C had a mass of 46.05 g. The volume of the flask was found to be 263.2 mL.

empirical formula -> C2H4O

What is the molecular formula of the compound?

  • chemistry -

    mass vapor = 46.05-45.32 = 0.73g
    Use PV = nRT
    Solve for n = number of mols
    Then mol = grams/molar mass
    You have grams and mol solve for molar mass.
    molar mass/empirical mass = x. Round to whole number and
    molecular formula = (C2H4O)*x

  • chemistry -

    thank you so much!

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