Explain the following phenomena in terms of intermolecular forces. Determine the major type of forces between the molecules.

Question

a) You can't clean grease off you hand with water only
b) Pancake syrup is more dense than olive oil. Please provide the structure of both in your discussion.
c)Water beads up on a newly waxed car
d)Br2 and I2 are both nonpolar compounds with London forces being the major types of forces between their molecules. Yet, Br2 is liquid and I2 is solid at room temperature.