I need help with the questions from the last 2 chapters. As in previous chapters, The correct answers are highlighted in red. I need explanations on they got that certain answer.

Chapter 9.2
1. What is the hybridization of S in ?
a.
b.  

c.  

d. 

2. What orbitals overlap to form the B—F  bonds in ?
a. Boron  + fluorine 2p
b. Boron  + fluorine 2p
c. Boron  + fluorine 2s
d. Boron  + fluorine 2s
3. Which of the following is incorrect?
a. The hybridization of N in  is ?
b. The hybridization of S in  is ?
c. The hybridization of I in  is ?
d. The hybridization of O in  is ?
4.  Bonds between two atoms are formed by overlap of what orbitals?
a.  on atom A with  on atom B
b.  on atom A with  on atom B
c.  on atom A with  on atom B
d.  on atom A with  on atom B
5. Which description of the bond between nitrogen atoms in is correct?
a. The nitrogens are attached by a single  bond
b. The nitrogens are attached by one  and two  bonds
c. The nitrogens atoms are  hybridized
d. The bonds in  are formed by overlap of  orbitals
Chapter 9.3
1. What is the N—O bond order in nitrogen monoxide, NO?
a. 2
b. 2.5
c. 3.0
d. 1
2. What is the HOMO in the peroxide ion, ?
a.
b.
c.
d.
3. Which of the following species is diamagnetic? 
a.

b.
c.
d.
4. Among the known dioxygen species (, , , ), which is expected to have the shortest 
bond length? 
a.
b.
c.  
d.
Chapter 11.3
1. Which gas has the greatest density at C and 1.00 atm pressure?
a.
b.
c.
d.
e.
2. Gas A is in a 2­L flask with a pressure of 1 atm at 298 K. Gas B is in a 4­L flask 
with a pressure of 0.5 atm at 273 K. Which gas is present in greater amount, A or 
B?
a. A
b. B
3. Measured at a pressure of 1.0 atm and 298 K, gas C has a density of 2.0 g/L. The 
density of gas D, measured at a pressure of 0.5 atm and 298 K, is 1.3 g/L. Which 
gas, C or D, has the larger molar mass?
a. C
b. D 
Chapter 11.7
1. IN figure 11.17, ammonia gas and hydrogen chloride are introduced from opposite 
ends of a glass U­tube. The gases react to produce white, solid What are the 
relative root mean square speeds of HCI and ?
a. rms for HCI/rms for =2.2
b. rms for HCI/rms for =1.5
c. rms for HCI/rms for =0.68
d. rms for HCI/rms for =0.46