Answer:
A. air pressure,this is answer.
 
        
                    
             
        
        
        
Convert  Mg  to  grams
1g =1000mg  what  about  3.91  Mg
=  3.91mg  x  1g/1000mg=  3.91  x10^-3 g
moles= mass/molar mass
that  is  3.91  x10^-3g  /99 g/mol=3.95 x10^-5moles
concentration=   moles  /  vol   in  liters
that  is  3.95  x10^-5/100  x1000=  3.94  x10^-4M
equation for  dissociation  of  CUCl=   CUCl---->  CU^+   +Cl^-
Ksp=(CU+)(CI-)
that  is  (3.95  x10^-4)(3.95  x10^-4)
Ksp=  1.56  x10^-7
        
                    
             
        
        
        
I don’t see nun tho where’s the objects
        
                    
             
        
        
        
A condensation reaction is described to be a reaction wherein two molecules form an even larger product and consequently produces a smaller molecule as a by-product. For example, when two amino acids are combined, a dipeptide bond is formed. As a result, 1 molecule of water is produced as a by-product.