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Question 20 (8 points) A 2.15 g sample of molecular solid was dissolved...
ill give good rating d) A 2.15 g sample of molecular solid was dissolved in 25.0...
ill give good rating d) A 2.15 g sample of molecular solid was dissolved in 25.0 g of CS2. The boiling point elevation of the solution was 1.59°C. Find the molar mass of the unknown. (Kb of CS2 is 1.07°C/m) e)What is the molality of C6H4Cl2 in a solution prepared by dissolving 2.97 g of C6H4Cl2 in 966 g of ethanol? f) The percent by mass of sodium sulfate in a solution of 32.0 g of sodium sulfate dissolved in...
A 2.56 gram sample of an unknown white solid was dissolved in water, making 450.0 mL...
A 2.56 gram sample of an unknown white solid was dissolved in water, making 450.0 mL of solution. At 25 °C, the solution exhibited an osmotic pressure of 0.407 atm. What is the molar mass of the solute? What would the boiling point elevation be for this solution (again assuming molarity and molality are essentially the same in this dilute solution)? (answer should be 342 g/mol; 0.00852 °C.)
32. (8 points) If a 25.0-g sample of a nonelectrolyte is dissolved in 145.0 g of...
32. (8 points) If a 25.0-g sample of a nonelectrolyte is dissolved in 145.0 g of water, the resulting solution will freeze at -0.89°C. What is the molar mass of the nonelectrolyte? (Kfp for water is 1.858°C/m.)
5. 1.024 g of an unknown molecular solid are dissolved in enough water to produce 200.0...
5. 1.024 g of an unknown molecular solid are dissolved in enough water to produce 200.0 mL of solution. The osmotic pressure at 25°C is 278.0 torr. What is the molar mass of the solid? 1342.5 g/mol
A 83.5 g sample of a nonelectrolyte is dissolved in 250.1 g of water. The solution...
A 83.5 g sample of a nonelectrolyte is dissolved in 250.1 g of water. The solution is determined to have a boiling point of 102.3 °C. What is the molar mass of the compound? (Kb for water is 0.510 °C/m).
5. 1.024 g of an unknown molecular solid are dissolved in enough water to produce 200.0...
5. 1.024 g of an unknown molecular solid are dissolved in enough
water to produce 200.0 mL of solution. The osmotic pressure at 25C
is 278.0 torr. What is the molar mass of the solid?
6a. Calculate the van't Hoff factor of a 0.085M potassium
sulfate solution that has an osmotic pressure of 5.4atm at
25C
5. 1.024 g of an unknown molecular solid are dissolved in enough water to produce 200.0 ml. of solution. The osmotic pressure at 25...
1.When a solution is made from 32.2 g of an unknown nonelectrolyte dissolved in 151 g...
1.When a solution is made from 32.2 g of an unknown nonelectrolyte dissolved in 151 g of solvent, the solution boils at 83.44 °C. The boiling point of the pure solvent and its Kb are 79.31 °C and 4.47 °C/m, respectively. Calculate the molar mass of the unknown electrolyte in g/mol. 2. Calculate the molar mass (in g/mol) of an unknown nonelectrolyte if 0.898 g dissolved in 268.7 mL of water at 30.13 °C has an osmotic pressure of 68.1...
given that Kb=3.63 8. 12 g of sucrose (CzH201, molecular weight 342 g/mol) is dissolved in 1 of form (CHCla, molecular weight 119 g/mol). What is the boiling point for this chloro solution?...
given that Kb=3.63
8. 12 g of sucrose (CzH201, molecular weight 342 g/mol) is dissolved in 1 of form (CHCla, molecular weight 119 g/mol). What is the boiling point for this chloro solution?
8. 12 g of sucrose (CzH201, molecular weight 342 g/mol) is dissolved in 1 of form (CHCla, molecular weight 119 g/mol). What is the boiling point for this chloro solution?
4. (6 points) The boiling point of an aqueous solution composed of 15.2 g of an...
4. (6 points) The boiling point of an aqueous solution composed of 15.2 g of an unknown molecular compound in 78.g of water is 108.3. C. What is the molar mass of the unknown compound? Kh for water is 5.21 °C/m. ivant noff factor ^ Th= i kbm AT6= boiling point elevat AT6= boiling point elevation met toolrood Kosmoral boiling point elevation constant (5.210/m! m= solution morarity. MW=mol = 15.2g 108.30 = 1(5.2104m) 20.78 = 48x10 m 108.3 108.3
Colligative properties, need to calculate the molar mass of the unknown substance: Can you please show the work for this problem? Thanks! 13 A solution was prepared by dissolving 59.82 g of an unknow...
Colligative properties, need to calculate the molar mass of the
unknown substance:
Can you please show the work for this problem?
Thanks!
13 A solution was prepared by dissolving 59.82 g of an unknown (non-ionic) substance to 100.0 g of water. The boiling point of this solution was measured to be 101.7°C. unknown substance. Determine the molar mass of the
13 A solution was prepared by dissolving 59.82 g of an unknown (non-ionic) substance to 100.0 g of water. The...
32. (8 points) If a 25.0-g sample of a nonelectrolyte is dissolved in 145.0 g of water, the resulting solution will freeze at -0.89°C. What is the molar mass of the nonelectrolyte? (Kfp for water is 1.858°C/m.)
5. 1.024 g of an unknown molecular solid are dissolved in enough water to produce 200.0 mL of solution. The osmotic pressure at 25°C is 278.0 torr. What is the molar mass of the solid? 1342.5 g/mol
5. 1.024 g of an unknown molecular solid are dissolved in enough
water to produce 200.0 mL of solution. The osmotic pressure at 25C
is 278.0 torr. What is the molar mass of the solid?
6a. Calculate the van't Hoff factor of a 0.085M potassium
sulfate solution that has an osmotic pressure of 5.4atm at
25C
5. 1.024 g of an unknown molecular solid are dissolved in enough water to produce 200.0 ml. of solution. The osmotic pressure at 25...
given that Kb=3.63
8. 12 g of sucrose (CzH201, molecular weight 342 g/mol) is dissolved in 1 of form (CHCla, molecular weight 119 g/mol). What is the boiling point for this chloro solution?
8. 12 g of sucrose (CzH201, molecular weight 342 g/mol) is dissolved in 1 of form (CHCla, molecular weight 119 g/mol). What is the boiling point for this chloro solution?
4. (6 points) The boiling point of an aqueous solution composed of 15.2 g of an unknown molecular compound in 78.g of water is 108.3. C. What is the molar mass of the unknown compound? Kh for water is 5.21 °C/m. ivant noff factor ^ Th= i kbm AT6= boiling point elevat AT6= boiling point elevation met toolrood Kosmoral boiling point elevation constant (5.210/m! m= solution morarity. MW=mol = 15.2g 108.30 = 1(5.2104m) 20.78 = 48x10 m 108.3 108.3
Colligative properties, need to calculate the molar mass of the
unknown substance:
Can you please show the work for this problem?
Thanks!
13 A solution was prepared by dissolving 59.82 g of an unknown (non-ionic) substance to 100.0 g of water. The boiling point of this solution was measured to be 101.7°C. unknown substance. Determine the molar mass of the
13 A solution was prepared by dissolving 59.82 g of an unknown (non-ionic) substance to 100.0 g of water. The...
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