Which substance has the weakest intermolecular forces? O Substance A, boiling point of 75 °C
O Substance B, boiling point of 105 °C
O Substance C, boiling point of 25 °C
Substance d, boiling point of 45 °C

Idon’t know how to solve this question

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

)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.