HELP FAST!!What type of intermolecular force/ bond is illustrated by #1? How do you know? Note that these are H2O molecules.

Looks like Hydrogen bonds.  (a hydrogen bond is a very strong dipole-dipole bond)

Explanation:

Hydrogen bonds can only form when H is bonded to N, O, or F (remember FON).  This is the case here because this is H2O.  The negative ends of the Oxygen are attracted to the positive ends of the Hydrogen.  It is a dipole-dipole attraction because H2O is polar, however, because H is bonded to O and the attraction is occurring in this manner, it is a Hydrogen Bond.  (Remember a hydrogen bond is just a very strong dipole-dipole bond)