12 14 2016 RWW03 Concentration Units WebAssign RWW03 Concentration Units Homework Current Score 100 Paddy Sheehan CH 201 section 002 Fall 2016 Instructor Robert Warren Due Sunday September 4 2016 11 59 PM EDT The due date for this assignment is past Your work can be viewed below but no changes can be made 1 8 points How many grams of NaCl are required to prepare 546 mL of a 0 383 M solution of NaCl No Response 12 22 g NaCl 2 14 points How many millimoles of Cr2O72 ions and K1 ions are present in 301 mL of a 0 0550 M K2Cr2O7 No Response 16 6 mmol Cr2O72 No Response 33 2 mmol K1 3 8 points How many ml of 0 530 M Na3PO4 are required to deliver 34 0 mmol Na1 ions No Response 21 4 mL 4 8 points How many mL of 0 330 M NaNO3 could be made from 8 05 g of NaNO3 No Response 287 0 mL 5 8 points What is the mass percent of sucrose C12H22O11 Mm 342 g mol in a 0 448 m sucrose solution No Response 13 29 C12H22O11 http www webassign net web Student Assignment Responses view key dep 14314084 1 3 12 14 2016 RWW03 Concentration Units 6 8 points How many grams of K3PO4 Mm 212 g mol must be added to 345 g of water to make a solution with a colligative molality of 0 245 m No Response 4 48 g K3PO4 7 14 points What are the mole fraction X and molality m of ethanol C2H5OH in an aqueous solution that is 35 0 ethanol by volume The density of water is 1 00 g mL and that of ethanol is 0 789 g mL mole fraction No Response 0 1425 molality No Response 9 224 m 8 8 points To what volume should 32 00 mL of a 9 20 M HCl solution be diluted to prepare a 0 500 M HCl solution No Response 588 8 mL 9 8 points What is H1 in a solution prepared by mixing the following solutions 27 9 mL of 6 40 M HCl 29 9 mL of 6 80 M HCl 17 8 mL of 2 20 M HCl 15 2 mL of water H1 No Response 4 64 M 10 8 points A solution is found to be 0 0591 by weight AlBr3 What is the concentration of the Br1 ion expressed in ppm No Response 531 ppm http www webassign net web Student Assignment Responses view key dep 14314084 2 3 12 14 2016 RWW03 Concentration Units 11 8 points A 0 158 M solution of X Mm 165 g mol has a density of 1 149 g ml What is the molality of X in the solution No Response 0 141 m http www webassign net web Student Assignment Responses view key dep 14314084 3 3
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