1. A maple tree could be studied in many fields of science. What aspect of a maple
tree might be studied in chemistry?
A measuring the amount of water it removes from the soil
OB identifying the parts that take in water, make food, and make seeds
C analyzing how its seeds float in the wind
D comparing the matter that makes up its different parts

)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.