A Student Prepared a Stock Solution by Dissolving 10

Multiple Choice

A student prepared a stock solution by dissolving 10.0 g of KOH in enough water to make 150 mL of solution.She then took 15.0 mL of the stock solution and diluted it with enough water to make 65.0 mL of a final solution.What is the concentration of KOH for the final solution?

A) 0.274 mol L^-1
B) 0.356 mol L^-1
C) 2.81 mol L^-1
D) 3.65 mol L^-1