Protactinium 
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Answer:
If temperature increases, as it does in most reactions, a chemical change is likely to be occurring. This is different from the physical temperature change. During a physical temperature change, one substance, such as water is being heated.
Explanation:
 
        
                    
             
        
        
        
Answer:
moles = 36/180 = 0.2 moles
molarity = 0.2/2 = 0.1 mol/dm3
 
        
             
        
        
        
Answer:
I think that frying an egg is a chemical because it takes in heat in order to make the reaction occur.