A substance that has no specific volume changes to a substance that has a specific volume.
 
        
                    
             
        
        
        
Answer:
A= Metallic
B= Conducts electricity as a solid 
C= Covalent 
D=Does not conduct electricity 
Explanation:
 
        
             
        
        
        
Answer: 27 is A and 28 is C.
Explanation: I’ll explain 28 but not 27 because that’s just definitions. 
In CuSO4 there is a Cu, an S, and 4 O molecules. Add them up you get 6. 
 
        
             
        
        
        
I believe the density p1 is greater than the density p2 .
Since the liquid are at equilibrium in the the open U-tube, the pressure at which the liquids meet should be the same. That is at the position where they are in contact, the pressure that liquid 1 exerts at that point is the same as the pressure exerted by liquid 2 at the point.