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Prepare For It! Prelab Question A student weighs a flask, foil cover, and rubber band and...
DATA TABLE Trial 1 Trial 2 Mass of Erlenmeyer flask, rubber band and foil cover (g) 90.560 90.10 Temperature of wat...
DATA TABLE Trial 1 Trial 2 Mass of Erlenmeyer flask, rubber band and foil cover (g) 90.560 90.10 Temperature of water bath (°C) 100t 99.1 Mass of Erlenmeyer flask, rubber band, foil cover and condensed 0819 gas sample (9) Mass of the condensed gas sample (9) 251.59 Barometric (atmospheric) pressure (mmHg) 128.96 28.93 Volume of the Erlenmeyer flask (mL) 170 170 Molar mass of the unknown sample (g/mole) Average molar mass (g/mol): DATA ANALYSIS (Show your calculations) 1. Determine the...
THE MOLAR MASS OF A VOLATILE LIQUID 1. A foil-covered flask was found to have a...
THE MOLAR MASS OF A VOLATILE LIQUID 1. A foil-covered flask was found to have a mass of 161.38 have a mass of 167.38 g. A volatile liquid was placed L00.0°C at a barometric pressure of 743.8 mm Hg. The foil-covered inside and heated to 100.0°C at a barometric press flask containing the vapor had a mass the molar mass of this volatile liquid. 's the vapor had a mass of 167.71 g and a volume of 147.0 mL. Calculate...
Barometric Pressure 0.992 atm Mass of Flask + Foil 56 g Mass of Flask + Foil...
Barometric Pressure 0.992 atm Mass of Flask + Foil 56 g Mass of Flask + Foil + Condensed Liquid 59 g Mass of Condensed Liquid 3 g Volume of Flask 300 ml Temperature of Water Bath when Vaporization Begins 333 K Temperature of Water Bath when Water Begins to Boil 363 K Molar Mass 46 g mol Ideal gas law PV=nRT P=pressure V=volume of gas n=number of moles R=gas constant T=temperature Molar volume V=RT/P Density of gas D=PM x RT Molar mass M=(mRT)/(PV) I...
i dont understand why the molecular weight i calculated (42.012 g/mol) for my unknown liquid (acetone)...
i dont understand why the molecular weight i calculated
(42.012 g/mol) for my unknown liquid (acetone) is less than the
actual molecular weight (58.08 g/mol). what errors could i have
made in my lab that would account for the difference.
Molecular Weight of a Volatile Liquid In this experiment, an amount of liquid more than sufficient to fill the flask when vaporized is placed in a flask of measured volume and mass. The flask is then heated in a boiling...
How do you solve Part D. Calculations (Moles of vapor, mass of vapor, and molar mass...
How do you solve Part D.
Calculations (Moles of vapor, mass of vapor, and molar mass of
vapor)
3. a. The following data were recorded in determining the molar mass of a volatile liquid following the Experimental Procedure of this experiment. Complete the table for analysis. (See Report Sheet.) Record calculated values with the correct number of significant figures. Calculation Zone 74.722 Part D.1 98.7 74.921_ Part D.2 A. Preparing the Sample 1. Mass of dry flask, foil, and rubber...
An empty 149 mL flask weighs 68.322 g before a sample of volatile liquid is added....
An empty 149 mL flask weighs 68.322 g before a sample of volatile liquid is added. The flask is then placed In a hot (95.0 degree C) water bath; the barometric pressure is 740 mm Hg. The liquid vaporizes and the gas fills the flask. After cooling the flask and condensed liquid together weigh 68.697 g. What is the molar mass of the volatile liquid? 9.73g/mol 78.09 g/mol 4.80 times 10^-3 g/mol 49.69/mol 44.01 g/mol
Chame nsead tu age 06-17 Experiment 8: Molar Mass of a Volatile Liquid Purpose To determine...
Chame nsead tu age 06-17 Experiment 8: Molar Mass of a Volatile Liquid Purpose To determine the molar mass of a pure substance we need to find out (a) the number of moles in a given sample, and (b) the mass of the same sample. Molar mass is then: mass divided by moles Introduction Using the ideal gas equation, PV= nRT, we can determine the number of moles (n) of gas or vapor under measured conditions of pressure (P), volume...
List t wo reasons why it is necessary to put a pinhole in the aluminum foil...
List t wo reasons why it is necessary to put a pinhole in the aluminum foil 2. Why was it NOT necessary to clean and dry the flask before performing your second determination? 3. A certain liquid has a molecular weight of 100 g/mole. The following data were obtained for a Dumas molecular weight determination: V-0.265 liters T 372 K and P 1.02 atm g of condensed vapor 0.58 g From this data a molecular weight of 65.5 g/mole was...
please help ? MST SHOW ALL CALCULATIONSs. Please be neat. Use correct significant figures. 1. A...
please help ?
MST SHOW ALL CALCULATIONSs. Please be neat. Use correct significant figures. 1. A student masses an empty flask, aluminum foil (witha small pinhole), and copper wire and finds the mass to be 54.8680 g. She then adds about 5.0 mL of an unknown liquid and heats the flask in a hot waterbath to 95.0 °C. After all the liquid is vaporized, she removes the flask from the bath and masses it after it has cooled. The mass...
In a collision of sufficient force, automobile air bags respond by electrically triggering the ex...
In a collision of sufficient force, automobile air bags respond
by electrically triggering the explosive decomposition of sodium
azide (NaN3) to its elements. A 43.398 g sample of
sodium azide was decomposed, and the nitrogen gas generated was
collected over water at 22°C. The total pressure was 798.8 mmHg.
How many liters of dry N2 were generated?
An atmospheric chemist studying the pollutant SO2
places a mixture of SO2 and O2 in a1.14 L
container at 825.7 K and 2.3...
DATA TABLE Trial 1 Trial 2 Mass of Erlenmeyer flask, rubber band and foil cover (g) 90.560 90.10 Temperature of water bath (°C) 100t 99.1 Mass of Erlenmeyer flask, rubber band, foil cover and condensed 0819 gas sample (9) Mass of the condensed gas sample (9) 251.59 Barometric (atmospheric) pressure (mmHg) 128.96 28.93 Volume of the Erlenmeyer flask (mL) 170 170 Molar mass of the unknown sample (g/mole) Average molar mass (g/mol): DATA ANALYSIS (Show your calculations) 1. Determine the...
THE MOLAR MASS OF A VOLATILE LIQUID 1. A foil-covered flask was found to have a mass of 161.38 have a mass of 167.38 g. A volatile liquid was placed L00.0°C at a barometric pressure of 743.8 mm Hg. The foil-covered inside and heated to 100.0°C at a barometric press flask containing the vapor had a mass the molar mass of this volatile liquid. 's the vapor had a mass of 167.71 g and a volume of 147.0 mL. Calculate...
i dont understand why the molecular weight i calculated
(42.012 g/mol) for my unknown liquid (acetone) is less than the
actual molecular weight (58.08 g/mol). what errors could i have
made in my lab that would account for the difference.
Molecular Weight of a Volatile Liquid In this experiment, an amount of liquid more than sufficient to fill the flask when vaporized is placed in a flask of measured volume and mass. The flask is then heated in a boiling...
How do you solve Part D.
Calculations (Moles of vapor, mass of vapor, and molar mass of
vapor)
3. a. The following data were recorded in determining the molar mass of a volatile liquid following the Experimental Procedure of this experiment. Complete the table for analysis. (See Report Sheet.) Record calculated values with the correct number of significant figures. Calculation Zone 74.722 Part D.1 98.7 74.921_ Part D.2 A. Preparing the Sample 1. Mass of dry flask, foil, and rubber...
An empty 149 mL flask weighs 68.322 g before a sample of volatile liquid is added. The flask is then placed In a hot (95.0 degree C) water bath; the barometric pressure is 740 mm Hg. The liquid vaporizes and the gas fills the flask. After cooling the flask and condensed liquid together weigh 68.697 g. What is the molar mass of the volatile liquid? 9.73g/mol 78.09 g/mol 4.80 times 10^-3 g/mol 49.69/mol 44.01 g/mol
Chame nsead tu age 06-17 Experiment 8: Molar Mass of a Volatile Liquid Purpose To determine the molar mass of a pure substance we need to find out (a) the number of moles in a given sample, and (b) the mass of the same sample. Molar mass is then: mass divided by moles Introduction Using the ideal gas equation, PV= nRT, we can determine the number of moles (n) of gas or vapor under measured conditions of pressure (P), volume...
List t wo reasons why it is necessary to put a pinhole in the aluminum foil 2. Why was it NOT necessary to clean and dry the flask before performing your second determination? 3. A certain liquid has a molecular weight of 100 g/mole. The following data were obtained for a Dumas molecular weight determination: V-0.265 liters T 372 K and P 1.02 atm g of condensed vapor 0.58 g From this data a molecular weight of 65.5 g/mole was...
please help ?
MST SHOW ALL CALCULATIONSs. Please be neat. Use correct significant figures. 1. A student masses an empty flask, aluminum foil (witha small pinhole), and copper wire and finds the mass to be 54.8680 g. She then adds about 5.0 mL of an unknown liquid and heats the flask in a hot waterbath to 95.0 °C. After all the liquid is vaporized, she removes the flask from the bath and masses it after it has cooled. The mass...
In a collision of sufficient force, automobile air bags respond
by electrically triggering the explosive decomposition of sodium
azide (NaN3) to its elements. A 43.398 g sample of
sodium azide was decomposed, and the nitrogen gas generated was
collected over water at 22°C. The total pressure was 798.8 mmHg.
How many liters of dry N2 were generated?
An atmospheric chemist studying the pollutant SO2
places a mixture of SO2 and O2 in a1.14 L
container at 825.7 K and 2.3...
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