A 26.13-g sample of a solid is placed in a flask. Toluene, in which the solid...
A 26.13-g sample of a solid is placed in a flask. Toluene, in which the solid is insoluble, is added to the flask so that the total volume of solid and liquid together is 50.0 mL. The solid and toluene together weigh 54.85 g. The density of toluene at the temperature of the experiment is 0.864 g/mL. What is the density of the solid?
Homework Answers
Density of a substance can be calculated by the equation
d=m/v
Where
M=weight of the substance
V= volume of the substance
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A 26.13-g sample of a solid is placed in a flask. Toluene, in
which the solid...
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
A pure solid sample of Substance X is put into an evacuated flask. The flask is...
A pure solid sample of Substance X is put into an evacuated flask. The flask is heated at a steady rate and the temperature recorded as time passes. Here is a graph of the results: 190.- TI temperature (°C) 150. 30. heat added (kJ/mol) Use this graph to answer the following questions: What is the melting point of X ? 1°C What phase (physical state) of X would you expect to find in the flask after 19 kJ/mol of heat...
a.) A 2.50 L flask was used to collect a 2.65 g sample of propane gas,...
a.) A 2.50 L flask was used to collect a 2.65 g sample of propane gas, . After the sample was collected, the gas pressure was found to be 743 mmHg. What was the temperature of the propane in the flask? ______°C b.)Butane,C4H10 , is an easily liquefied gaseous fuel. Calculate the density of butane gas at 0.791 atm and 24°C. Give the answer in grams per liter. Density = ______g/L c.) A 0.488-g sample of a colorless liquid was...
A pure solid sample of Substance X is put into an evacuated flask. The flask is...
A pure solid sample of Substance X is put into an evacuated flask. The flask is heated at a steady rate and the temperature recorded as time passes. Here is a graph of the results: 190 150 temperature (°C) 110 heat added (kJ/mol Use this graph to answer the following questions: 150.0°C What is the boiling point of X? (check all that apply) solid liquid What phase (physical state) of X would you expect to find in the flask after...
A student weighs out 14.6 g of AlBrz, transfers it to a 300 mL volumetric flask,...
A student weighs out 14.6 g of AlBrz, transfers it to a 300 mL volumetric flask, adds enough water to dissolve the solid and then adds water to the 300 mL mark on the neck of the flask. Calculate the concentration (in molarity units) of aluminum bromide in the resulting solution? Calculate the mass, in grams of sodium iodide that must be added to a 250 mL volumetric flask in order to prepare 250 mL of a 0.138 M aqueous...
1. A volatile organic liquid with known molecular weight is added to a vapor density flask which has a known volume. The...
1. A volatile organic liquid with known molecular weight is added to a vapor density flask which has a known volume. The flask is heated using a boiling water bath until all of the liquid has evaporated. After heating for an additional 1 or 2 minutes, the flask is removed from the boiling water bath, corked, and cooled using a room temperature water bath. Predict the mass of condensed vapor. Temperature of the hot water bath (ºC): 99.5 Volume of...
A volatile organic liquid with known molecular weight is added to a vapor density flask which has a known volume. The fl...
A volatile organic liquid with known molecular weight is added to a vapor density flask which has a known volume. The flask is heated using a boiling water bath until all of the liquid has evaporated. After heating for an additional 1 or 2 minutes, the flask is removed from the boiling water bath, corked, and cooled using a room temperature water bath. Predict the mass of condensed vapor. Temperature of the hot water bath (ºC): 99.4 Volume of the...
It was important that the flask be completely dry before the unknown liquid was added so...
It was important that the flask be completely dry before the unknown liquid was added so that water present would not vaporize when the flask was heated. A typical single drop of liquid water has a volume of approximately 0.05 mL. Assuming the density of liquid water is 1.0 g/mL, how many moles of water is in one drop of liquid water, and what volume would this amount of water occupy when vaporized at 100°C and 1 atm?
It was important that the flask be completely dry before the unknown liquid was added so...
It was important that the flask be completely dry before the unknown liquid was added so that water present would not vaporize when the flask was heated. A typical single drop of liquid water has a volume of approximately 0.05 mL. Assuming the density of liquid water is 1.0 g/mL, how many moles of water is in one drop of liquid water, and what volume would this amount of water occupy when vaporized at 100°C and 1 atm?
An irregular piece of the metal is found to weigh 87.4g. It is then placed into...
An irregular piece of the metal is found to weigh 87.4g. It is then placed into a graduated cylinder that contains some liquid. The liquid in the cylinder has an initial volume of 18.46 ml. After the metal was added and the liquid's level rises to 24.14 mL afterward. What is the density of this piece of metal in g/mL units? Enter a number without units.
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
A pure solid sample of Substance X is put into an evacuated flask. The flask is heated at a steady rate and the temperature recorded as time passes. Here is a graph of the results: 190.- TI temperature (°C) 150. 30. heat added (kJ/mol) Use this graph to answer the following questions: What is the melting point of X ? 1°C What phase (physical state) of X would you expect to find in the flask after 19 kJ/mol of heat...
A pure solid sample of Substance X is put into an evacuated flask. The flask is heated at a steady rate and the temperature recorded as time passes. Here is a graph of the results: 190 150 temperature (°C) 110 heat added (kJ/mol Use this graph to answer the following questions: 150.0°C What is the boiling point of X? (check all that apply) solid liquid What phase (physical state) of X would you expect to find in the flask after...
A student weighs out 14.6 g of AlBrz, transfers it to a 300 mL volumetric flask, adds enough water to dissolve the solid and then adds water to the 300 mL mark on the neck of the flask. Calculate the concentration (in molarity units) of aluminum bromide in the resulting solution? Calculate the mass, in grams of sodium iodide that must be added to a 250 mL volumetric flask in order to prepare 250 mL of a 0.138 M aqueous...
It was important that the flask be completely dry before the unknown liquid was added so that water present would not vaporize when the flask was heated. A typical single drop of liquid water has a volume of approximately 0.05 mL. Assuming the density of liquid water is 1.0 g/mL, how many moles of water is in one drop of liquid water, and what volume would this amount of water occupy when vaporized at 100°C and 1 atm?
It was important that the flask be completely dry before the unknown liquid was added so that water present would not vaporize when the flask was heated. A typical single drop of liquid water has a volume of approximately 0.05 mL. Assuming the density of liquid water is 1.0 g/mL, how many moles of water is in one drop of liquid water, and what volume would this amount of water occupy when vaporized at 100°C and 1 atm?
An irregular piece of the metal is found to weigh 87.4g. It is then placed into a graduated cylinder that contains some liquid. The liquid in the cylinder has an initial volume of 18.46 ml. After the metal was added and the liquid's level rises to 24.14 mL afterward. What is the density of this piece of metal in g/mL units? Enter a number without units.
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