英文化学题2天有效5.Molecular Structure on Bond Angles (Points:1) Rank the H-X-H bond angle from largest to smallest for the molecules formaldehyde (),methyl chloride (),borane (),and water ():a.BH3 > H2CO > H2O > CH3Clb.H2O > H2CO > BH3 > CH3

英文化学题2天有效5.Molecular Structure on Bond Angles (Points:1) Rank the H-X-H bond angle from largest to smallest for the molecules formaldehyde (),methyl chloride (),borane (),and water ():a.BH3 > H2CO > H2O > CH3Clb.H2O > H2CO > BH3 > CH3
英文化学题2天有效
5.Molecular Structure on Bond Angles
(Points:1) Rank the H-X-H bond angle from largest to smallest for the molecules formaldehyde (),methyl chloride (),borane (),and water ():
a.BH3 > H2CO > H2O > CH3Cl
b.H2O > H2CO > BH3 > CH3Cl
c.H2CO > CH3Cl > H2O > BH3
d.BH3 > H2CO > CH3Cl > H2O
e.CH3Cl > H2CO > BH3 > H2O
f.BH3 > CH3Cl > H2O > H2CO
g.BH3 > CH3Cl > H2CO > H2O
h.CH3Cl > BH3 > H2O > H2CO
i.H2O > CH3Cl > H2CO > BH3
j.H2CO > BH3 > CH3Cl > H2O
6.Bond Order and Magnetic Character
(Points:1)
The bond order and magnetic character of carbon monoxide with a +2 charge,is:
a.2.5,paramagnetic
b.2.0,diamagnetic
c.2.0,paramagnetic
d.1.5,diamagnetic
e.3.0,diamagnetic
f.2.5,diamagnetic
g.1.0,diamagnetic
h.1.0,paramagnetic
i.1.5,paramagnetic
j.3.0,paramagnetic
7.Bond Order
(Points:1)
Rank the following ions in decreasing NO bond order:nitrite ion,nitric oxide with -1 charge,nitrate ion,and nitric oxide with +1 charge:vs.vs.vs.
a.nitrite > NO+ > NO- > nitrate
b.nitrate > NO- > NO+ > nitrite
c.NO+ > nitrate > nitrite > NO-
d.NO- > NO+ > nitrate > nitrite
e.nitrate > NO+ > NO- > nitrite
f.nitrite > nitrate > NO+ > NO-
g.NO- > nitrite > nitrate > NO+
h.nitrate > nitrite > NO- > NO+
i.NO+ > NO- > nitrate > nitrite
j.NO+ > NO- > nitrite > nitrate
8.Bonding
(Points:1)
The compound acetonitrile,,contains _____ sigma and _____ pi bonds.
a.5,3
b.3,3
c.6,2
d.4,3
e.6,3
f.4,1
g.5,1
h.5,2
i.6,1
j.4,2

英文化学题2天有效5.Molecular Structure on Bond Angles (Points:1) Rank the H-X-H bond angle from largest to smallest for the molecules formaldehyde (),methyl chloride (),borane (),and water ():a.BH3 > H2CO > H2O > CH3Clb.H2O > H2CO > BH3 > CH3
5.d
6.b
7.j
8.h

这学不上了。花了钱，只是让别人学了。还不如回家卖烤白薯呢。