|  |  |  |  |  |  |  |  |  |  |  | 
   
    | • | Fluorine can
    react with oxygen to yield oxygen 
 |  | 
   
    |  | 
   
    |  | difluoride:    2F2(g)
    + O2(g) D 2OF2(g) 
 |  | 
   
    |  | 
   
    | • | What is
    the value of Keq if the following 
 |  | 
   
    |  |  | 
   
    |  | 
   
    |  | concentrations
    are found at equilibrium? 
 |  | 
   
    |  | 
   
    |  | [O2]
    = 0.200mol/L; [F2]=0.0100mol/L 
 |  | 
   
    |  | [OF2]=0.0633mol/L 
 |  | 
   
    |  | 
   
    | • | What
    is [O2] at equil when [OF2]=0.22mol/L and 
 | 
   
    |  | 
   
    |  | 
   
    |  | [F2]=0.0300mol/L? 
 |  | 
   
    |  | 
   
    | • | What is
    [OF2] at equil when 
 |  | 
   
    |  |  | 
   
    |  | [F2]=0.080mol/L and [O2]
    = 0.650mol/L? 
 |  |