1.) what is the steric number and the bond angles associated with each of the following molecules if a is the central atom, x refers to the atoms bonded to it and there are no lone pairs on the central atom.

ax3
ax4
ax6

2.)what is the electron domain geometry of the following molecules?

brcl5
bcl3
ph3

3.)which of the following molecules has a trigonal planar structure?

co32−
socl2
h3o+
so32

4.)the following geometries are possible for a molecule with three atoms bonded to a central atom
assuming the bonded atoms are halogens, determine the central atom for each of these molecular geometries choosing from one of the following atoms.

be, al, br, or as,

5.)put the following three molecules in order of increasing h—x—h bond angle, where x is the central atom.

ch4 h2s ph3

ch4 < h2s < ph3
h2s < ph3 < ch4
ch4 < ph3 < h2s
h2s < ch4 < ph3
ph3 < ch4 < h2s

if you can can you also provide explanation you