The diagram below shows three types of earthquake waves, labeled A, B, and C at different time intervals. The statement that is correct about the three waves is <span>Wave A and Wave B are absorbed by liquid medium. The answer is letter B.</span>
        
                    
             
        
        
        
That’s a hard one, but honestly i would go with a.
        
                    
             
        
        
        
Pure substances are substances which are homogenous in nature. They either consists of atoms of 1 kind or molecules of 1 kind. Atoms are seen in elements, where as molecules are seen in compounds like Acids, Bases, etc.
They mostly have fixed properties like boiling and melting points and are uniform in nature. :D
 
        
             
        
        
        
Answer:
2Mg(s) + O2 (g) -> 2MgO(g)