can someone help with this question

Question

A sodium hydroxide solution of 0.1 mol/L concentration needs to be prepared from a 2.0 mol/L solution. What volume of the concentrated solution should you use to prepare 500 mL of the diluted solution?

Answer 1

V1M1 = V2M2

(x ml)(2.0 M) = (500 ml)(0.1 M)

Solve for x and that is the volume of the concentrated solution to use.