Answer:
 = -457.9 kJ and reaction is product favored.
 = -457.9 kJ and reaction is product favored.
Explanation:
The given reaction is associated with 2 moles of 
Standard free energy change of the reaction ( ) is given as:
) is given as:
             , where T represents temperature in kelvin scale
   , where T represents temperature in kelvin scale
So, 
So, for the reaction of 1.57 moles of  ,
, 
As,  is negative therefore reaction is product favored under standard condition.
 is negative therefore reaction is product favored under standard condition.
 
        
             
        
        
        
Types of Bonds can be predicted by calculating the
difference in electronegativity.
If, Electronegativity difference is,
 
                Less
than 0.4 then it is Non Polar Covalent
             
  
               
Between 0.4 and 1.7 then it is Polar Covalent 
            
               
Greater than 1.7 then it is Ionic
 
For Be and F,
               
    E.N of Fluorine          =   3.98
               
    E.N of Beryllium        =   1.57
               
                     
             ________
               
    E.N Difference                2.41          (Ionic Bond)
For H and Cl,
                    E.N of Chorine           =   3.16
                    E.N of Hydrogen        =   2.20
                                                   ________
                    E.N Difference                0.96          (Polar Covalent Bond)
For Na and O,
                    E.N of Oxygen          =   3.44
                    E.N of Sodium          =   0.93
                                                       ________
                    E.N Difference                2.51          (Ionic Bond)
For F and F,
                    E.N of Fluorine          =   3.98
                    E.N of Fluorine          =   3.98
                                                        ________
                    E.N Difference                0.00         (Non-Polar Covalent Bond)
Result:
           A polar covalent bond is formed between Hydrogen and Chlorine atoms.
 
        
             
        
        
        
Momentum = mass x velocity 750x25 = 18750 kg-m/s.
 
        
             
        
        
        
It would be a,b,c as the answer. hope this helps!