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.

The size of the molecules allows for the formation of many weak attractions with other molecules.

Explanation:

Olive is mostly made up of the fatty acid called oleic acid (C18:1) which is a monosaturated omega 9 fatty acid.  

The formula of oleic acid is CH₃(CH₂)₇CH=CH(CH₂)₇COOH

The long hydrocarbon chain of oleic acid allows it to have many weak intermolecular forces along the length of the molecule. The major intermolecular forces acting between long hydrocarbon chains are London dispersion forces.  

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).

i belive it is water