a. give the number of lone pairs around the central atom and the molecular geometry of XeF2- b. give the number of lone pairs around the central atom and the geometry of the ion IBr2- c. a Molecule with 3 single bonds and 1 lone pair of electrons around the central atom is predicted to have what type of molecular geometry? d. which of the following molecules is polar? PBr5, CCl4, BrF5, XeF2, XeF4 e. a sp3d hybridized central atom has what angles between its hybrid orbitals? f. the f-s-f bond angles in SF6 are: g:arrange the following substances in order of increasing boiling point: CH3CH2OH, HOCH2CH2OH, CH3CH2Cl, ClCH2CH2OH h: HOCH2CH2OH(s) is classified as which of the following? mettalic crystal, covalent solid, molecular crystal, amorphous solid, ionic crystal i: the most efficient arrangement of shperes is found in which type of unit cell? face-centered cubic, body-centered cubic, simple cubic, face-centered cubic and body centered cubic, body centered cubic and simpkle cubic f: the most space efficient arrangement of spheres is found in which type(s) of atom arrangements? I. hexagonal close-packing II. cubic close packed III. simple cubic IV. body centered cubic