Further Applications of the Ideal-Gas Equation (Section)In

Chapter 6, Problem 55E

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In the Dumas-bulb technique for determining the molar mass of an unknown liquid, you vaporize the sample of a liquid that boils below \(100^{\circ} \mathrm{C}\) in a boiling-water bath and determine the mass of vapor required to fill the bulb (see drawing, next page). From the following data, calculate the molar mass of the unknown liquid: mass of unknown vapor, 1.012 g; volume of bulb, 354 \(cm^3\); pressure, 742 torr; temperature, \(99^{\circ} \mathrm{C}\).

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