Consider the hydrocarbon below. h h \ / c===c / \ h h what is the name of this hydrocarbon? propene pentene butene ethene

ethene

Explanation:

The representation of the hydrocarbon is:

H        H
  \       /
  C = C
  /        \
H         H

So, the double C bond means it is an alkene.

The number of  carbon atoms in the molecule is named with the proper prefix:

propa - is used for 3 carbon atoms
penta - is used for 5 carbon atoms
but - is used for 4 carbon atoms
etha - is use for 2 carbon atoms.

Therefore that alkene is name ethene

Ch4 is nonpolar and insoluble in water. since all of the hydrogen atoms are evenly spread around the carbon atom even through the c h bond is polar all the poles cancel each other out.