Kb is 3.63 °C/m.) A Top: KbpMsdute AT: (61.82C - 61.93°C): 0.23°C mass of hexa chlorophene: 0.6409 mass of chlowform: 25g Molal boiling point elevahen Constant moles molav mas5 of chloroform is 3.63 °C/m ATbe Кыр (O.25e エ632/m)0.0し33しm %3D msdute: Khp -molal boiling point elevahion Consknt 259/ lkg 0.0633しm -)(0.0154) Ikg mole : mass molar mass 0.015kg 1,584 X10°mol 404 /ml molav mass : A 1.37 M solution of citric acid (H3C6H5O7) in water has a density of 1.10 g/mL. What is mass numbev of nole 1-58X10 mol 4. the mass percent of the solution? Density = 1.10g/mL Molavity molav mass H3 CG Hs07 1.00 X10mL Soln kt0g miL 1.37 mot X 192.13 Mot 2639 (1.08)3)+(7.01)+ (6008X5) +1)G) :1.37M 2635 X 100 : 23.9% 192.13 %3D 5. How many grams of ethylene glycol, C2H4(OH)2, must be added to 5.50 kg of water to lower the freezing point of water from 0.0 °C to -10.0 °C? (This is approximately the situation in the radiator of your car.) Calculate the molality of C2H5OH in a water solution which is prepared by mixing 50.0 mL of C2H5OH with 100.0 mL of H2O at 20°C. The density of C2H5OH is 0.789 g/mL at 20°C and that of water is 0.99970 g/mL. 6.

Kb is 3.63 °C/m.) A Top: KbpMsdute AT: (61.82C - 61.93°C): 0.23°C mass of hexa chlorophene: 0.6409 mass of chlowform: 25g Molal boiling point elevahen Constant moles molav mas5 of chloroform is 3.63 °C/m ATbe Кыр (O.25e エ632/m)0.0し33しm %3D msdute: Khp -molal boiling point elevahion Consknt 259/ lkg 0.0633しm -)(0.0154) Ikg mole : mass molar mass 0.015kg 1,584 X10°mol 404 /ml molav mass : A 1.37 M solution of citric acid (H3C6H5O7) in water has a density of 1.10 g/mL. What is mass numbev of nole 1-58X10 mol 4. the mass percent of the solution? Density = 1.10g/mL Molavity molav mass H3 CG Hs07 1.00 X10mL Soln kt0g miL 1.37 mot X 192.13 Mot 2639 (1.08)3)+(7.01)+ (6008X5) +1)G) :1.37M 2635 X 100 : 23.9% 192.13 %3D 5. How many grams of ethylene glycol, C2H4(OH)2, must be added to 5.50 kg of water to lower the freezing point of water from 0.0 °C to -10.0 °C? (This is approximately the situation in the radiator of your car.) Calculate the molality of C2H5OH in a water solution which is prepared by mixing 50.0 mL of C2H5OH with 100.0 mL of H2O at 20°C. The density of C2H5OH is 0.789 g/mL at 20°C and that of water is 0.99970 g/mL. 6.

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter13: Isolation Of Eugenol From Clov

Section: Chapter Questions

Problem 9Q

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Chlorodifluoromethane (CHF2Cl) was widely used in the compression/cooling circuits of refrigeration or air-conditioning systems. Since the discovery that such compounds (HCFCs and CFC's) released into the atmosphere were a major cause of depletion of stratospheric ozone, newer refrigeration systems make use of certain hydrofluorocarbons (HFCs), which are degraded in the lower atmosphere, instead. Often, mixtures of such compounds are used. Suppose a sample of refrigerant gas consisting of a simple mixture of the gases pentafluoroethane (C2HF5) and difluorormethane (CH2F2) has a density of 3.06 g/L at 14 °C and 0.974 atm. Calculate the average molecular mass for this sample
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Chlorodifluoromethane (CHF2Cl) was widely used in the compression/cooling circuits of refrigeration or air-conditioning systems. Since the discovery that such compounds (HCFCs and CFC's) released into the atmosphere were a major cause of depletion of stratospheric ozone, newer refrigeration systems make use of certain hydrofluorocarbons (HFCs), which are degraded in the lower atmosphere, instead. Often, mixtures of such compounds are used. Suppose a sample of refrigerant gas consisting of a simple mixture of the gases pentafluoroethane (C2HF5) and 111-trifluoroethane (C2H3F3) has a density of 2.39 g/L at 23 °C and 0.593 atm. 1. Calculate the average molecular mass for this sample. 2. Calculate the volume percentage of C2H3F3 in the sample.
Chlorodifluoromethane (CHF2Cl) was widely used in the compression/cooling circuits of refrigeration or air-conditioning systems. Since the discovery that such compounds (HCFCs and CFC's) released into the atmosphere were a major cause of depletion of stratospheric ozone, newer refrigeration systems make use of certain hydrofluorocarbons (HFCs), which are degraded in the lower atmosphere, instead. Often, mixtures of such compounds are used. Suppose a sample of refrigerant gas consisting of a simple mixture of the gases pentafluoroethane (C2HF5) and 111- trifluoroethane ((C2H3F3) has a density of1.95 g/L at 23 °C and 0.432 atm. Calculate the average molecular mass for this sample. Calculate the volume percentage of C2H3F3 in the sample.
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