Answer:
= 40 mL
Explanation:
Using the dilution formula;
M1V1 = M2V2
where M1 is the initial concentration, V1 is the initial volume, M2 is the concentration attained while V2 is the new volume.
Therefore; To get the new volume;
V2 = M1V1/M2
= ( 20mL × 4 M)/ 2 M
= 40 mL
