Which statement describes a typical path of the north american polar jet stream?
a.
the polar jet stream weaves east to west over the arctic circle.
b.
the polar jet stream arcs north over southern texas and then south to the gulf of mexico.
c.
the polar jet stream dips south of the tip of florida and then goes east over the atlantic.
d.
the polar jet stream flows south through the great lakes and then north along the eastern seaboard.

)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.