Answer:
Please mark me brainliest. the answer is 
Explanation:
The problem is that the desalination of water requires a lot of energy. Salt dissolves very easily in water, forming strong chemical bonds, and those bonds are difficult to break. Energy and the technology to desalinate water are both expensive, and this means that desalinating water can be pretty costly.
 
        
             
        
        
        
Answer:
 electrons should be added to one of these spheres to make it electrically neutral.
 electrons should be added to one of these spheres to make it electrically neutral.
Explanation:
Total charge on each sphere =  +3.0 μC =

In order to neutralize the positive charge equal magnitude of negative charge is to be added.
Total charge electrons, Q=  -3.0 μC =
Number of electrons = n
Charge on a single electron, e = 
Q = n × e


 electrons should be added to one of these spheres to make it electrically neutral.
 electrons should be added to one of these spheres to make it electrically neutral.
 
        
             
        
        
        
Answer:
It causes light to slow down significantly
Explanation:
The index of refraction of a substance describes the speed of light in that substance, as a ratio of the speed of light in vacuum to its speed in that substance. 
just search it up and there is your answer
 
        
                    
             
        
        
        
Answer:

Explanation:
When acetic acid solution and barium hydroxide solution react together to give an aqueous solution of barium acetate and water
The balanced chemical reaction will be given by 

 
        
             
        
        
        
Answer:
The answer is
<h2>219.5 mL</h2>
Explanation:
The volume of a substance when given the density and mass can be found by using the formula

From the question
mass = 4500 g
density = 20.5 g/cm³
We have

We have the final answer as
<h3>219.51 mL</h3>
Hope this helps you