Answer is D breaking apart I to not more than two
        
             
        
        
        
No, there’s not any pressure
        
             
        
        
        
Answer:
I believe Na
Explanation:
Copper, because it is the only metal out of all of them.
Therefore copper is the only element that can loose electrons to have a positive charge, it is the most likely to become a cation.
 
        
             
        
        
        
1- Molar solutions: based on number of moles of chemical in 1 litre of solution
2- Weight % solution:  the weight of chemical divided by the total weight of the solution (chemical + water) and multiplied by 100.