Chem help

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For which of the following molecules would the intermolecular forces be influenced mainly by dipole-dipole forces?

PH3
CH3OHO
HF
C2H5OH
CH3COCH3

how do I determine this

  • Chem help -

    What's CH3OHO? a typo perhaps?
    HF yes
    C2H5OH but to a much smaller extent. Both HF and C2H5OH have hydrogen bonds but they are dipoles also.

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