Given that (1) the amount of the reparations was $28.8 billion dollars, (2) the value of gold at the time was about $21.25 per troy ounce (1 troy ounce = 31.103 g), and (3) gold occurs in seawater to the extent of 4.67×1017 atoms per ton of seawater (1 ton = 2000 lb), how many cubic kilometers of seawater would have had to be processed to obtain the required amount of gold? Assume that the density of seawater is 1.03 g/cm3. (Haber's scheme proved to be commercially infeasible, and the reparations were never fully paid.)

Which sentence best explains the high melting point, boiling point, and surface tension of water? a. the hydrogen atom on each water molecule is strongly attracted to the hydrogen atoms on nearby molecules. b. ions dissolved in the water cause nearby molecules to become temporarily polar. c. the water molecules are connected to each other with covalent bonds. d. water molecules that have lost electrons attract the water molecules that have gained electrons. e. the negative side of each water molecule is attracted to the positive sides of nearby molecules.