Hello guys I want help to solve those question please !
Calculate the mole fraction of phosphoric acid (H3PO4) in a 26.6% (by mass) aqueous solution.
What is the freezing point (°C) of a solution prepared by dissolving 11.3 g of Ca(NO3)2 in 115 g of water? The molal freezing point depression constant for water is
The concentration of CO2 in a soft drink bottled with a partial pressure of CO2 of 4.0 atm over the liquid at 25 °C is 1.2 × 10-1 M. The Henry's law constant for CO2 at this temperature is ________.
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The concentration of urea (MW = 60.0 g/mol) in a solution prepared by dissolving 16 g of urea in 39 g of H2O is ________ molal.
The vapor pressure of pure ethanol at 60 °C is 0.459 atm. Raoult's Law predicts that a solution prepared by dissolving 10.0 mmol naphthalene (nonvolatile) in 90.0 mmol ethanol will have a vapor pressure of ________ atm.
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Calculate the vapor pressure of a solution made by dissolving 109 grams of glucose in 920.0 ml of water at 25 °C. The vapor pressure of pure water at is . Assume the density of the solution is 1.00 g/ml.
George is making spaghetti for dinner. He places 4.01 kg of
water in a pan and brings it to a boil. Before adding the pasta, he
adds 58 g of table salt (NaCl) to the water and again brings it to
a boil. The temperature of the salty, boiling water is
________°C.
Assume a pressure of 1.00 atm and negligible evaporation of water.
Kb for water is
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Hello guys I want help to solve those question please ! Calculate the mole fraction of...
please show all work 3) The vapor pressure of pure ethanol at 60 °C is 0.459 atm. Raoult's Law predicts that a solution prepared by dissolving 10.0 mmol naphthalene (nonvolatile) in 90.0 mmol ethanol will have a vapor pressure of atm. A) 0.790 B) 0.498 C) 0.367 D) 0.413 E) 0.0918 4) George is making spaghetti for dinner. He places 4.01 kg of water in a pan and brings it to a boil. Before adding the pasta, he adds 58...
Calculate the vapor pressure of a solution made by dissolving 94.5 g of urea (molar mass= 60.06 g/mol) in 214.5 mL of water at 35°C (Hint: The vapor pressure of pure water at 35°C is given in the table below. Assume the density of the solution is 1.00 g/mL.) What is the magnitude of vapor-pressure lowering? mmHg
Be sure to answer all parts. Calculate the vapor pressure of a solution made by dissolving 87.8 g of urea (molar mass = 60.06 g/mol) in 224.5 mL of water at 35°C. (Hint: The vapor pressure of pure water at 35°C is given in the table below. Assume the density of the solution is 1.00 g/mL.) I nHg What is the magnitude of vapor-pressure lowering? D nHg
please help! is #7 right? and please help me do #8 7. The vapor pressure above a sugar-water solution at 25°C is 21.4 torr. What is the mole fraction of sugar in the solution? (assume the vapor pressure of water at 25°C is 23.8 torr) O.To = X 8. It is found that 3.90 g of benzene, C6H6, dissolved in 100.0g of a solvent lowers the freezing point to 10.0°C. The pure solvent freezes at 25°C. What is the molal...
Activity 1: Ch. 13 New Material Clusters of 3 or 4 Vapor Pressure Problem: Glycerin (C3H803) is a nonvolatile nonelectrolyte with a density of 1.26 g/mL at 25 °C Calculate the vapor pressure at 25 °C of a solution made by adding 50.0 mL of glycerin to 500.0 mL of water. The vapor pressure of pure water at 25 °C is 23.8 torr, and its density is 1.00 g/mL. Equation Henry's Law Problem: Calculate the concentration of CO2 in a...
8. What is the final boiling point of a 1.25 molal solution of sugar in water? The Kb for water is 0.512 C/m. (For sugar i = l.) 9. A solution was prepared by dissolving 0.52 mol hexane into 400g CCl4. What is the change in freezing point of this solution? Carbon tetrachloride has a freezing point depression constant of 29.8 Cm,and freezes at-23。. 10. A solution was prepared by dissolving 0.26 moles of ethanol (C2HsOH) into 750g Diethyl ether....
I need help with problem 16. Not problem 16 under chapter 13 set 5. *9. 9. The vapor pressure of pure toluene, CyHx, is 137 torr at 60°C. What is the vapor pressure of toluene in a solution made by dissolving 25.0 grams of the nonelectrolyte glucose, C6H12O6, in 50.0 grams of toluene at 60°C? 10. The vapor pressure of water is 118 torr at 55°C. How many grams of urea, CO(NH2)2 must be added to 67.4 grams of water...
I need help in find the solution and understanding the work process behind solve the problems step by step. I would appreciate the help with these problems 1. What is the treezing point of a solution prepared by dissolving 20 g of NaCI (MW 58.4 g mol) in 150 ml. of water? The freezing point depression constant, K, for water 53.4 2. What is the osmotic pressure formed by dissolving 44 2 mg of aspirin (C,l1,0) in 0.358 L of...
Can all questions be answered please 39-49 39. The vapor pressure of pure water at 25 °C is 23.8 torr. What is the vapor pressure (torr) of water above a solution prepared by dissolving 18.0 g of glucose (a nonelectrolyte, MW- 180.0 g mol) in 95.0 g of water? A) 24.3 B)234 C0451 D) 0.443 E) 23.8 40. What is the freezing point (C) of a solution prepared by dissolving 11.3 g of(formula weight 164 g/mol) in 115 g of...
Е. попе E. 0.733 and 1.324 14. the molar mass of toluene is 92.6 gmol, how much tokuene is needed to depress the freezing point of 200 g of benzene by 047C? K 5.12 Cm a The vapor pressure of pure water at 26 "C is 25.2 torr. What is he vapor pressure of a solution that contains 16.0 g of glucose (CaHuO) dissolved in 80 g of water? A. 1.7g A. 14.1 tor B. 17g B. 24.7 torm C....