<span>When a chemical reaction occurs and the thermometer in the container records a drop in temperature t</span>he reaction is exothermic because heat was released by the reaction.
 <span>B. The reaction is exothermic because heat was released by the reaction. is your answer.
Hoped I helped!</span>
        
                    
             
        
        
        
Answer:
percentage by mass of each element in a compound.
Explanation:
 
        
             
        
        
        
Answer:
On the picture are all principles cited on wikipedia.
Explanation:
So the answer is
1. Environment must be exploited to improve living standards
2. Flourishing human and nonhuman life depends on diversity of life forms
 
        
             
        
        
        
Answer:
Electronic configuration, also called electronic structure, the arrangement of electrons in energy levels around an atomic nucleus. 
 
        
                    
             
        
        
        
Answer:
I believe the organelle should replace the question mark!