Find the number of molecules/species which have zero dipole moment along with the presence of non-bonding electron pair/s on the central atom.

${\mathrm{BF}}_3,{\mathrm{NH}}_3,{\mathrm{CHCl}}_3,{\mathrm{XeF}}_2,{\mathrm{PF}}_5,{\mathrm{XeO}}_4,{\mathrm{I}}_3^{-},{\mathrm{XeF}}_4,{\mathrm{SF}}_6$