How many structural isomers are there for hydrocarbons having the molecular formula C6H14?
A) three
B) four
C) five
D) six
Question 2
Why does a paper clip float when placed on water?
A) It is lighter than water.
B) It is less dense than water.
C) It only floats on dense, cold water.
D) The molecules of water hold together and keep it from sinking.