Answer:
C.
Explanation:
The hydronium ion concentration can be found from the pH by the reverse of the mathematical operation employed to find the pH. 
 
        
             
        
        
        
Answer: Shield volcanoes
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Many of Hawaii's main islands are all famous examples of shield volcanoes. Hawaii itself is a large hotspot, which is a part of earth's surface that has multiple volcanoes.<span />
        
             
        
        
        
Competition, they try to grow taller than other trees to get more sunlight
        
             
        
        
        
<span>The globin chains of myoglobin and hemoglobin prevent the oxidation of Fe2 to Fe3 , which irreversibly binds oxygen. The cooperativity of oxygen binding in hemoglobin arises from electronic interactions between heme groups.</span>