[" 9."4.46times10^(-2)mol^((d))" constants for gases.Chlorine "],[" 9."and 'b'are van der Waals' constants for gases.Chlorine "],[" is more easily liquefied than ethane because "],[[" (a) "a" and "b" for "Cl_(2)>a" and "b" for "C_(2)H_(6),," (colll ")]]