Sample Problem 5.9 Finding the Molar Mass of a Volatile Liquid PROBLEM: An organic chemist isolates a colorless liquid from a petroleum sample. She places the liquid in a preweighed flask and puts the flask in boiling water, causing the liquid to vaporize and fill the flask with gas. She closes the flask and reweighs it. She obtains the following data: T= 100.0°C P= 754 torr Volume (V) of flask mass of flask + gas = 78.416 g = 213 mL mass of flask = 77.834 g %3D Calculate the molar mass of the liquid.

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