Which statement would be the most useful for deriving the ideal gas law? a. volume is directly proportional to the number of moles. b. volume is inversely proportional to the temperature. c. pressure is directly proportional to the volume. d. pressure is inversely proportional to the number of moles.

What are the primary responsibilities of a chemical engineer involved in "r& d"? develop large scale manufacturing operations discover new products and processes training of new chemists determine products needed by consumers

)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.

Which type of intermolecular attractions holds ammonia molecules together with other ammonia molecules?