USATestPrep: Which intermolecular attractive force results in highest vapor pressure?

A) hydrogen bonding

B) interionic force

C) dipole-dipole attraction

D) London disperse force

A4.86 g piece of metal was placed in a graduated cylinder containing 15.5 ml of water. the water level rose to 17.3 ml. what is the density of the metal. i need the steps of how to solve it to so i can use a formula to work out other problems.