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Properties < Question 6 (of 10) points 2 attempts left Check my work Be sure to...
The vapor pressure of methanol (32.043 g/mol), CH3OH, is 94 torr at 20 °C. The vapor...
The vapor pressure of methanol (32.043 g/mol), CH3OH, is 94 torr at 20 °C. The vapor pressure of ethanol (46.07 g/mol), C2H5OH, is 44 torr at the same temperature. Calculate the total vapor pressure above a solution of 32.4 g of methanol and 23.9 g of ethanol.
5. Ethanol and methanol are form an ideal solution at 20 °C. Vapor pressure of pure...
5. Ethanol and methanol are form an ideal solution at 20 °C. Vapor pressure of pure ethanol and pure methanol at 20 °C is 44.5 and 88.7 mmHg, respectively. If 100 g of ethanol and 100 g of methanol are mixed into a solution, calculate: (a) the mol fractions of ethanol and methanol in the solution, (b) the partial pressures of ethanol and methanol and total pressure of the solution, and (c) the mol fraction of methanol in a vapor...
3 attempts left Check my work Be sure to answer all parts. Calculate the molarity of...
3 attempts left Check my work Be sure to answer all parts. Calculate the molarity of each of the following solutions. (a) 6.03 g of methanol (CH3OH) in 1.50 x 102 mL of solution: 1.37 mol/L (b) 9.60 g of calcium chloride (CaCl,) in 2.20 x 102 mL of solution: mol/L (c) 7.37 g of naphthalene (C10H8) in 85.2 mL of benzene solution: mol/L
2 attempts left Check my work Be sure to answer all parts. Rep Consider the following...
2 attempts left Check my work Be sure to answer all parts. Rep Consider the following apparatus. Calculate the partial pressure of helium (He) and neon (Ne) after the stopcock is open. The temperature remains constant at 16.0°C. Guid He Ne 1.20 L 1.230 atm 3.40 L 2.80 atm Partial pressure of He: 2.068 Partial pressure of Ne: 319 3 attempts left Check my work Enter the equivalent decimal and percent. Repo 29 100 The decimal is Guide: The percent...
attempts left Check my work ? Be sure to answer all parts. Report problem Hint A...
attempts left Check my work ? Be sure to answer all parts. Report problem Hint A mixture of CO2 and Kr weighs 41.8 g and exerts a pressure of 0.853 atm in its container. Since Kr is expensive, you wish to recover it from the mixture. After the CO2 is completely removed by absorption with NaOH(s), the pressure in the container is 0.279 atm. Solution (a) How many grams of CO2 were originally present? Guided Solution (b) How many grams...
HM 202-001 HW Chapter 12 Question 3 (of 14) value: 0.00 points 2 attempts left Check...
HM 202-001 HW Chapter 12 Question 3 (of 14) value: 0.00 points 2 attempts left Check my work Enter your answer in the provided box. How many grams of urea I(NH2)2CO] must be added to 495 g of water to give a solution with a vapor pressure 2.41 mmHg less than that of pure water at 30°c? (The vapor pressure of water at 30°C is 31.8 mmHg.) References eBook & Resources Multipart Answer Difficulty: 2 Difficulty: Medium
Saved 3 attempts left Check my work Be sure to answer all parts. When heated at...
Saved 3 attempts left Check my work Be sure to answer all parts. When heated at high temperatures, a diatomic vapor disassociates as follows: A2(g) = 2A(9) In one experiment, a chemist finds that when 0.0500 mole of A2 was placed in a flask of volume 0.528 L at 590 K, the degree of dissociation (that is, the fraction of A, dissociated) was 0.0296. Calculate K and Kp for the reaction at this temperature. Ke: Кр:
2 attempts left Check my work Be sure to answer all parts. A biochemical engineer isolates...
2 attempts left Check my work Be sure to answer all parts. A biochemical engineer isolates a bacterial gene fragment and dissolves a 16.0-mg sample in enough water to make 30.0 mL of solution. The osmotic pressure of the solution is 0.340 torr at 25°C. (a) What is the molar mass of the gene fragment? g/mol (b) If the solution density is 0.997 g/mL, how large is the freezing point depression for this solution (K of water = 1.86°C/m)?
13 C 3 attempts left Check my work Be sure to answer all parts. Calculate the...
13 C 3 attempts left Check my work Be sure to answer all parts. Calculate the pressure exerted by 0.27 moles of chlorine gas in a volume of 7.50 L at 37°C using the ideal gas equation. points atm Calculate the pressure exerted by 0.27 moles of chlorine gas in a volume of 7.50 L at 37°C using the van der Waals equation. Print atm References
alue 55 points 10 attempts left Check my work Be sure to answer all parts. Calculate...
alue 55 points 10 attempts left Check my work Be sure to answer all parts. Calculate the number of moles of KOH in 7.70 mL of a 0.260 M KOHl solution. mol What is the pOH of the solution at 25 C?
5. Ethanol and methanol are form an ideal solution at 20 °C. Vapor pressure of pure ethanol and pure methanol at 20 °C is 44.5 and 88.7 mmHg, respectively. If 100 g of ethanol and 100 g of methanol are mixed into a solution, calculate: (a) the mol fractions of ethanol and methanol in the solution, (b) the partial pressures of ethanol and methanol and total pressure of the solution, and (c) the mol fraction of methanol in a vapor...
3 attempts left Check my work Be sure to answer all parts. Calculate the molarity of each of the following solutions. (a) 6.03 g of methanol (CH3OH) in 1.50 x 102 mL of solution: 1.37 mol/L (b) 9.60 g of calcium chloride (CaCl,) in 2.20 x 102 mL of solution: mol/L (c) 7.37 g of naphthalene (C10H8) in 85.2 mL of benzene solution: mol/L
2 attempts left Check my work Be sure to answer all parts. Rep Consider the following apparatus. Calculate the partial pressure of helium (He) and neon (Ne) after the stopcock is open. The temperature remains constant at 16.0°C. Guid He Ne 1.20 L 1.230 atm 3.40 L 2.80 atm Partial pressure of He: 2.068 Partial pressure of Ne: 319 3 attempts left Check my work Enter the equivalent decimal and percent. Repo 29 100 The decimal is Guide: The percent...
attempts left Check my work ? Be sure to answer all parts. Report problem Hint A mixture of CO2 and Kr weighs 41.8 g and exerts a pressure of 0.853 atm in its container. Since Kr is expensive, you wish to recover it from the mixture. After the CO2 is completely removed by absorption with NaOH(s), the pressure in the container is 0.279 atm. Solution (a) How many grams of CO2 were originally present? Guided Solution (b) How many grams...
HM 202-001 HW Chapter 12 Question 3 (of 14) value: 0.00 points 2 attempts left Check my work Enter your answer in the provided box. How many grams of urea I(NH2)2CO] must be added to 495 g of water to give a solution with a vapor pressure 2.41 mmHg less than that of pure water at 30°c? (The vapor pressure of water at 30°C is 31.8 mmHg.) References eBook & Resources Multipart Answer Difficulty: 2 Difficulty: Medium
Saved 3 attempts left Check my work Be sure to answer all parts. When heated at high temperatures, a diatomic vapor disassociates as follows: A2(g) = 2A(9) In one experiment, a chemist finds that when 0.0500 mole of A2 was placed in a flask of volume 0.528 L at 590 K, the degree of dissociation (that is, the fraction of A, dissociated) was 0.0296. Calculate K and Kp for the reaction at this temperature. Ke: Кр:
2 attempts left Check my work Be sure to answer all parts. A biochemical engineer isolates a bacterial gene fragment and dissolves a 16.0-mg sample in enough water to make 30.0 mL of solution. The osmotic pressure of the solution is 0.340 torr at 25°C. (a) What is the molar mass of the gene fragment? g/mol (b) If the solution density is 0.997 g/mL, how large is the freezing point depression for this solution (K of water = 1.86°C/m)?
13 C 3 attempts left Check my work Be sure to answer all parts. Calculate the pressure exerted by 0.27 moles of chlorine gas in a volume of 7.50 L at 37°C using the ideal gas equation. points atm Calculate the pressure exerted by 0.27 moles of chlorine gas in a volume of 7.50 L at 37°C using the van der Waals equation. Print atm References
alue 55 points 10 attempts left Check my work Be sure to answer all parts. Calculate the number of moles of KOH in 7.70 mL of a 0.260 M KOHl solution. mol What is the pOH of the solution at 25 C?
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