1. F the force on each charge, + indicates repulsion, - indicates attraction k the electrostatic constant q1 the quantity of charge 1 measured in coulombs q2 the quantity of charge 2 measured in coulombs r the radius of separation from center of one charge to the center of the other. 1elementary charge = 1.6x10 -19 Coulomb

3. substancevapor pressure at 25 o C diethyl ether0.7 atm bromine0.3 atm ethyl alcohol0.08 atm water0.03 atm

5. substancebp °C dipole moment D % dipole- induced dipole % dipole- dipole % dispersion Ar–186000100 CO–1900.100100 HCl–841.04.214.481.4 HBr–670.82.23.394.5 HI–350.4 0.199.5 NH 3 –331.55.444.650.0 H2OH2O1001.84.077.019.0

6. Liquid bp (°C) H vap (kJ/mol) carbon disulfide (CS 2 ) 46°28.4 chloroform (CHCl 3 ) 61.7°31.4 ethyl alcohol (C 2 H 5 OH) 78.5°40.4 water (H 2 O) 100°40.7