Please help! Answer the next five questions based on the diagram:

How many electrons are in the n = 1 shell?

How many electrons are in the n = 2 shell?

How many electrons are needed to complete the n = 2 shell?

How many electrons are being shared between the two nitrogen atoms?

How many bonds exist between the two nitrogen atoms?

)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.