A) Compute the molarity of a solution made by dissolving 0.730 grams of Na2SO4 in enough water to form precisely 930mL of solution.
B) Explain how many moles of KMnO4 are present in 280mL of a 4.80×10-2 M solution?
C) Explain how many milliliters of 11.1M HCl solution are needed to obtain 0.260 mol of HCl?