A stock solution was prepared by dissolving 340.0 g of sodium hydroxide in 2.00l of water. After preparing the solution 200.00 ml of that solution where transferred to a 150.00m l flask and diluted to the mark with water. After the second dilution 100.00ml of that solution where transferred to a 150.0 mL flask and it was diluted to the mark. What is the concentration of the final solution?