Answer:
C: It is the difference between the total kinetic and potential energy in a system
Explanation:
Potential energy is stored energy while kinetic energy is the energy of motion.... This is not the same as the object's total energy, which would be the sum of all forms of its energy, including thermal, chemical and so on. The type of potential energy stored in molecular bonds is a form of energy called chemical energy. 
Hope this helps 
 
        
                    
             
        
        
        
Answer:
Atom economy is the conversion efficiency of a chemical process in terms of all atoms involved and the desired products produced
 
        
             
        
        
        
D. mass and volume are needed to calculate an object's density. 
 
        
                    
             
        
        
        
A, B, and D. You already answered the first one, so I wouldn't think this would be too hard
:)
 
        
             
        
        
        
Answer:
salamat sapoints po lods thaks