5-16 Solve dilution problems

5-16-1. Consider a 0.500 NaOH(aq). If enough water is added to a 10.0 mL sample of this solution in order to bring up the total volume to 100.0mL, what is the molarity of the resulting solution?
A. 0.0500M
B. 1.00 M
C. 2.00M
D. 5.00M

5-16-2. How much water should be added to a 100.0mL sample of 6.000M NaOH in order to dilute the solution to 3.000M?
A. 100.0 mL
B. 200.0 mL
C. enough to bring the total volume to 200.0 mL
D. none of the above