Give the charge and full ground-state electron configuration of the monatomic ion most likely to be formed by the element. rb a. rb+: 1s22s22p63s23p64s23d104p65s2 b. rb+: 1s22s22p63s23p64s23d104p65s1 c. rb+: 1s22s22p63s23p64s23d104p5 d. rb+: 1s22s22p63s23p64s23d104p6 e. none of these

)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.

Describe the forces both attractive and repulsive that occur as two atoms move closer together.

Ariver current has a velocity of 5km/h relative to the shore, and a boat moves in the same direction as the current at 5 km/h relative to the river. how can the velocity of the boat relative to the shore be calculated?