(a) Calculate the molarity of a solution made by dissolving 0.0915 mol Na2SO4 in

Question

(a) Calculate the molarity of a solution made by dissolving 0.0915 mol Na2SO4 in enough water to form 550 mL of solution. M Answer to correct significant figures WebAssign will check your answer for the correct number of significant figures. M (b) How many moles of KMnO4 are present in 50.0 mL of a 0.0950 M solution? mol Answer to correct significant figures WebAssign will check your answer for the correct number of significant figures. mol (c) How many milliliters of 10.6 M HCl solution are needed to obtain 0.105 mol of HCl? mL Answer to correct significant figures

Explanation / Answer

a. molarity = no of moles/volume of solution in L

                  = 0.0915/0.55 = 0.166M

b. no of moles = molarity* volume of solution in L

                       = 0.095*0.05 =0.00475 moles

c. molarity = no of moles/volume of solution in L

   10.6       = 0.105/volume of solution in L

volume of solution in L = 0.105/10.6 = 0.0099L = 9.9ml >>> answer

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