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A 1.43-g sample of an unknown gas has a volume of 804 mL and a pressure of 852 mmHg at 59.0 °C. Calculate the molar mass of this compound.

A 1.43-g sample of an unknown gas has a volume of 804 mL and a pressure of 852 mmHg at 59.0 °C. Calculate the molar mass of this compound.

General Chemistry - Standalone book (MindTap Course List)
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter5: The Gaseous State
Section: Chapter Questions
Problem 5.127QP: A 1.000-g sample of an unknown gas at 0C gives the following data: P(atm) V (L) 0.2500 3.1908 0.5000...
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A 1.43-g sample of an unknown gas has a volume of 804 mL and a pressure of 852 mmHg at 59.0 °C. Calculate the molar mass of this compound. Approach g/mol The ideal gas law contains four variables (P. V. n, and T) and a constant (R = 0.082057 L atm/K mol): PV = nRT If you know three of the four variables, you can calculate the fourth. All properties must have units that match those in the gas constant: volume in liters, pressure in atmospheres, temperature in kelvins, and amount in moles. In this case you can solve for the amount (mol) of gas, n. Once n is determined, the molar mass is calculated by dividing the mass by the amount (mol) of gas.
Transcribed Image Text:A 1.43-g sample of an unknown gas has a volume of 804 mL and a pressure of 852 mmHg at 59.0 °C. Calculate the molar mass of this compound. Approach g/mol The ideal gas law contains four variables (P. V. n, and T) and a constant (R = 0.082057 L atm/K mol): PV = nRT If you know three of the four variables, you can calculate the fourth. All properties must have units that match those in the gas constant: volume in liters, pressure in atmospheres, temperature in kelvins, and amount in moles. In this case you can solve for the amount (mol) of gas, n. Once n is determined, the molar mass is calculated by dividing the mass by the amount (mol) of gas.
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