The strength of an acid increases if the stability of conjugate base increases
The stability of a conjugate base increases with the presence of electron with drawing group (electronegative group)
Thus more the electronegativity of an atom attached to a carboxylic acid higher the strength of acid
In these examples CH3CH2CH2CF2CH2COOH contains to electronegative flourine atoms which stabilizes the conjugate base hence this will be the strongest acid among the given acids
 
 
        
             
        
        
        
Rutherford's gold foil experiment proved that there was a small, dense, positively charged nucleus at the center, which contained most of the mass of the atom. Which contained electrons orbiting the nucleus.
        
             
        
        
        
Answer:
That involve the complete transfer of an electron from one atom of an element to another 
 
        
             
        
        
        
Hello
The word is "pollution"
Hope this helps and have a great day!
        
                    
             
        
        
        
Well, an independent variable ids the thing that  stays the same and a dependent variable is the thing that changes.