I'm not understanding that much. but if i'm right the answer is <span>3.84 x 10^-19 J</span>
        
             
        
        
        
Answer:
Ytterbium is a chemical element with the symbol Yb and atomic number 70. It is the fourteenth and penultimate element in the lanthanide
 
        
             
        
        
        
A, They Lower The Activation Energy.
        
                    
             
        
        
        
Answer:
Explanation:
it is tough question plz give me some time i would give you your ans soon
 
        
             
        
        
        
The answer is: A) Na3PO4 + 3KOH → 3NaOH + K3PO4, because K retains the same charge throughout the reaction.
This chemical reaction is double displacement reaction - cations (K⁺ and Na⁺) and anions (PO₄³⁻⁻ and OH⁻) of the two reactants switch places and form two new compounds.  
Na₃PO₄ is sodium phosphate.  
KOH is potassium hydroxide.  
NaOH is sodium hydroxide.  
K₃PO₄ is potassium phosphate.  
According to the mass conservation law, there are same number of atoms on both side of balanced chemical reaction.