Explanation:
It is known that the molecular weight of ammonia ( ) is as follows.
) is as follows.
    Molecular weight ( ) =
) =  = 17
 = 17
(a)    Therefore, we will calculate the mass as follows.
      
                        = 8500 g
Now, formula to calculate weight of the system in N is as follows.
             Weight = mass × g 
              = 
              = 83.3 N     (1  = 1 N)
 = 1 N)
Hence, the weight of the system is 83.3 N.
(b)   Relation between specific volume and number of moles is as follows.
             
Therefore, calculate the specific volume as follows.
        
                    = 12  
Also,  
                 
  
             v =  
 
                = 0.705882 
Therefore, we can conclude that the value of specific volume is 12  and 0.705882
  and 0.705882  .
.