what is the volume

Question

In the laboratory, a student dilutes 28.5 mL of an 8.57 M hydrobromic acid solution to a total volume of 200. mL. What is the concentration of the diluted solution?

Answer 1

V1M1 = V2M2

V1 = initial volume = 28.5 ml

M1 = initial molarity = 8.57 M

V2 = final volume = 200 ml

M2 = final molarity = ?

(28.5 ml)(8.57 M) = (200 ml)(x M)

x = 1.22 M