Verified Answer :

Willchemistry

volume of solute = 25 mL

Volume of solvent = 150 mL

% = ( volume of solute / volume of solvent ) x 100

% = ( 25 / 150 ) x 100

% = 0,166 x 100

= 16.6 % v/v

hope this helps!

Amount of Ethanol = 25 mlAmount of Water = 75 ml
Total Volume = 25 ml+150 ml                     
                      = 175 ml 

Percentage V/V = Amount of ethanol/Total volume x 100                          
                          = 25/75 * 100 %                         
                          = 14.2857%

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