30. Identify the most important types of interparticle forces present in the solids of each of the following substances. a. NH_(4)Cl b. Teflon, CF_(3)(CF_(2)CF_(2))_(n)CF_(3) C.Polyethylene, CH_(3)(CH_(2)CH_(2))_(n)CH_(3) d. CHCl_(3) e. NH_(3) f. NO g. BF_(3)

a. $NH_{4}Cl$: The most important interparticle forces present in the solids of $NH_{4}Cl$ are ionic forces between the ammonium ion ($NH_{4}^+$) and the chloride ion ($Cl^-$).<br /><br />b. Teflon, $CF_{3}(CF_{2}CF_{2})_{n}CF_{3}$: The most important interparticle forces present in the solids of Teflon are van der Waals forces (London dispersion forces) due to the nonpolar nature of the polymer chains.<br /><br />c. Polyethylene, $CH_{3}(CH_{2}CH_{2})_{n}CH_{3}$: The most important interparticle forces present in the solids of polyethylene are van der Waals forces (London dispersion forces) due to the nonpolar nature of the polymer chains.<br /><br />d. $CHCl_{3}$: The most important interparticle forces present in the solids of $CHCl_{3}$ (chloroform) are dipole-dipole forces due to the polar nature of the molecule.<br /><br />e. $NH_{3}$: The most important interparticle forces present in the solids of $NH_{3}$ (ammonia) are hydrogen bonding forces between the hydrogen atoms and the nitrogen atom.<br /><br />f. NO: The most important interparticle forces present in the solids of NO (nitric oxide) are van der Waals forces (London dispersion forces) due to the nonpolar nature of the molecule.<br /><br />g. $BF_{3}$: The most important interparticle forces present in the solids of $BF_{3}$ (boron trifluoride) are van der Waals forces (London dispersion forces) due to the nonpolar nature of the molecule.