How does temperatures affect the density of ocean water? a) as temperatures decrease, molecules move further apart, making cold water less dense than the warm water. b) as temperatures decrease, molecules move closer together, making cold water more dense then warm water. c) as temperatures increase, molecules move further apart, making the cold water less dense than the warm water. d) as temperatures increase, molecules move more closer together, making the warm water less dense than cold water.

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.