chemistry: molecular

1.Predict the geometry of the following molecules using the VSEPR method.
(a) HgBr2
a.linear
b.trigonal bipyramid
c.trigonal pyramid
d.tetrahedral



(b) N2O (arrangement of atoms is NNO)
a.tetrahedral
b.bent
c.trigonal pyramid
d.linear



(c) SCN- (arrangement of atoms is SCN)
a.linear
b.tetrahedral
c.trigonal pyramid
d.bent

2.Predict the geometries of the following species using the VSEPR method.
(a) PCl3
a.trigonal pyramid
b.tetrahedral
c.trigonal bipyramid
d.linear



(b) CHCl3
a.trigonal pyramid
b.bent
c.tetrahedral
d.linear



(c) SiH4
a.tetrahedron
b.trigonal bipyramid
c.seesaw
d.trigonal pyramid



(d) TeCl4
a.tetrahedron
b.trigonal pyramid
c.seesaw
d.bent

3,Which one of the following molecules has a dipole moment greater than zero?
CCl4
SF6
H2S
SiF4

4.Which one of the following has a dipole moment?
BeCl2
CO2
Br2
ICl