We need at least 10 more requests to produce the answer.
0 / 10 have requested this problem solution
The more requests, the faster the answer.
please show work? 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 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 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 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...
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
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...
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
A 15.3 g sample of a compound known to contain 3 ion species is dissolved in 110 g of water. The boiling point of the solution is 103.0 degrees Celsius. What is the molar mass of the compound? Additional Info: Physical Properties of water Freezing point: 0.00 degrees Celsius Boiling point: 100 degrees Celsius Kf: 1.86 Degrees Celsius/m Kb: 0.512 degrees Celsius/m
3a. Calculate the molar mass (in g/mol) of an unknown 1:1 electrolyte if 0.482 g dissolved in 223.1 mL of water at 74.75 °C has an osmotic pressure of 54.4 mmHg. R = 0.082058 L⋅atm⋅mol−1⋅K−1. 1.00 atm = 760 mmHg. Report your answer to THREE significant figures. 3b. Calculate the required mass of an unknown nonelectrolyte (ℳ = 131.5599 g/mol) dissolved in 140.1 g of solvent that gives a solution that boils at 36.04 °C. The boiling point of the...
6. A 1.07 mg sample of a compound was dissolved in 78.1 mg of camphor. The resulting solution melted at 176.0 C. What is the molecular mass of the compound? The melting point of pure camphor is 179.5 C. The freezing-point-depression constant for camphor Kf is 40.0 C/m. 7. A solution is prepared by dissolving 5.88 g of an unknown nonelectrolyte in enough water to make 0.355 L of solution. The osmotic pressure of the solution is 1.21 atm at...