Question

3 multiple choice 1 point
identify the predominate type of intermolecular force that exists between the molecules in substance a below.
substance a
london dispersion forces
dipole - dipole interaction
ionic bonding force
hydrogen bonding

Explanation:

• London Dispersion Forces are weak forces present in all molecules but are not the predominant here as there is a dipole - dipole indication.
• Ionic Bonding Force is between ions (not applicable as no ions are shown in the structure).
• Hydrogen Bonding requires a hydrogen atom bonded to a highly electronegative atom (N, O, F). Here, it is S - H bonds (not strong enough for hydrogen bonding).
• The structure shows partial charges ($\delta^+$ and $\delta^-$) on different parts of the molecule. Dipole - dipole interactions occur between polar molecules (molecules with a permanent dipole moment). The presence of partial charges indicates a polar molecule, so dipole - dipole interaction is the predominant force.

Answer:

Dipole - Dipole Interaction