A stock solution containing Mn21 ions is prepared by dissolving 1.584 g of pure manganese metal in nitric acid and diluting to a final volume of 1.000 L. The following solutions are prepared by dilution. For solution A, 50.00 mL of stock solution is diluted to 1000.0 mL.

For solution B, 10.00 mL of A is diluted to 250.0 mL.

For solution C, 10.00 mL of B is diluted to 500.0 mL.

Calculate the molar concentrations of the stock solution and solutions A, B, and C.