A solution contains 20 mL of ethanol in a total volume of 100 mL. The concentration of this solution is
A. 2.0 M.
B. 2.0 % by mass.
C. 20 % by mass.
D. 20 % by volume.
Answer:D
A solution contains 20 mL of ethanol in a total volume of 100 mL. The concentration of this solution is
A. 2.0 M. B. 2.0 % by mass. C. 20 % by mass. D. 20 % by volume.