The question is incomplete, the complete question is;
Predict the concentration if a 0.5 M solution, with a volume of 500 mL, is diluted to a volume of 1 liter. Show the calculation of this concentration, include units in all your work.
Answer:
0.25 M
Explanation:
From;
C1V1 =C2V2
C1= initial concentration = 0.5 M
C2 = final concentration = the unknown
V1 = initial volume = 500 ml
V2 = final volume = 1 litre = 1000 ml
substituting values;
0.5 * 500 = C2 * 1000
C2 = 0.5 * 500/1000
C2 = 0.25 M