1.The long hydrocarbon molecules that make up olive oil only possess weak London dispersion forces between them, yet olive oil is a viscous liquid. How is this possible?
London dispersion forces are strong when molecules contain only C and H atoms.
The regular, repeating shape of hydrocarbon molecules allows them to pack in a crystal structure.
Hydrocarbons are more volatile than compounds that contain other kinds of atoms.
The size of the molecules allows for the formation of many weak attractions with other molecules.

Question

1.The long hydrocarbon molecules that make up olive oil only possess weak London dispersion forces between them, yet olive oil is a viscous liquid. How is this possible?
London dispersion forces are strong when molecules contain only C and H atoms.
The regular, repeating shape of hydrocarbon molecules allows them to pack in a crystal structure.
Hydrocarbons are more volatile than compounds that contain other kinds of atoms.
The size of the molecules allows for the formation of many weak attractions with other molecules.

dancing_stars23 · Answer

2. Substances held together with only Van der Waal's forces, such as methane, CH4, have relatively low melting and boiling points.

 True 

 False

thadyoung · Answer

The forces that attract them together, yes, are very weak, but you have to consider long hydrocarbons and their length. Since long hydrocarbons have free rotation, they can be free to rotate about and become very tangled. 
It's like when you have earphones and you just crunch them up into a ball and shake it. It's going ot be hard to untangle. 
But, if you have small pieces of string (which is small in comparison to earphones) they wont get tangled as much.

dancing_stars23 · Answer

@TheSmartOne can you help with number 1? still not understanding