The SN2 mechanism for nucleophilic substitution reactions A) ...

[mckennatimberlake]

The S_N2 mechanism for nucleophilic substitution reactions
  A)
  involves two steps and occurs with inversion of configuration.
  B)
  involves one step and occurs with inversion of configuration.
  C)
  involves two steps and occurs with racemization.
  D)
  involves one step and occurs with retention of configuration.
  E)
  involves one step and occurs with racemization.

Question 2

Which of the following bromides will react faster with CH₃OH in an S_N1 reaction?
  A)
   
 
  B)
   
 
  C)
   
 
  D)
   
 
  E)
   
 

Question 3

The slowest step of an S_N1 reaction involves:
  A)
  attack of the nucleophile on the substrate to form a pentavalent carbon.
  B)
  breaking the bond between the carbon and the leaving group to give a carbocation.
  C)
  combination of a nucleophile with the carbocation to give the product.
  D)
  loss of a proton from the nucleophile to give the product.
  E)
  none of the above.

[yuyiding]

Answer to Question 1

b

Answer to Question 2

d

Answer to Question 3

b

[mckennatimberlake]

Wow, this really help

[atrochim]

Great answer, keep it coming