A 15.00 mL sample of a solution marked concentrated barium hydroxide is discovered in the back of a chemical cabinet, but no specific molarity is listed. In order to determine the concentration a 1.00 mL sample of the solution is taken and diluted with 99.00 mL of water. This dilute solution is then analyzed and it is determined that the concentration of barium hydroxide in it is 0.012 M.

a) What was the concentration of the initial solution of barium hydroxide? b) How many mol of barium hydroxide (chemical formula Ba(OH)2 ) was contained in the original 15.00 mL sample? c) If the molar mass of barium hydroxide (chemical formula Ba(OH)2 ) is 171.35 grams per mol, how many grams of barium (a toxic heavy metal) were in the original sample?