The answer is D, because gems are usually not mettallic
        
                    
             
        
        
        
Answer:
a  H2CO3 b HCO3- and c H+ and HCO3-
Explanation:
As the pKa value of phenol is more than that of carbonic acid(H2CO3), the carbonic acid will have high Ka value than that of phenol.
   The acid that contain high Ka value act as stong acid.From that point of view H2CO3 is a strong acid than phenol as the Ka value of carbonic acid is greater than that of phenol.
   The conjugate base of H2CO3 is bicarbonate ion(HCO3-)
c The species that predorminates at equilibrium are H+ and HCO3-
 
        
             
        
        
        
Answer:
Helium has melting point of - 272.2°C or - 458°F
Sodium (Na) = 650°C. or 208°C
Magnesium (Mg) = 97.79°C. Or 1202°F
Explanation:
 
        
             
        
        
        
Answer:
Sound energy is the form of energy generated when an object vibrates. Once produced through vibrations, sound energy is transferred in waves through mediums such as air and water before it reaches your ears.
 
        
             
        
        
        
Answer:
Kim kim kim kim kim ath marath enthe kantha 
Explanation:
Ninn chumbenem enne thellerthii.
Nin vadabell enne shwasichu!