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A student performed an experiment at 760 torr. He obtained a sample of an unknown, volatile liquid. He placed it in a 2.00-L Erlenmeyer flask and covered it with a lid containing a tiny pinhole. The student placed the flask in boiling water of 100°C until all the air in the flask escaped through the pinhole and all of the liquid was vaporized. He then immersed the flask in cold water to condense the gas. He dried the flask and determined the mass of the condensed vapor. The mass of the condensed vapor was 3.0 grams. What is the molar mass of the liquid?

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A student performed an experiment at 760 torr. He obtained a sample of an unknown, volatile liquid. He placed it in a 2.00-L Erlenmeyer flask and covered it with a lid containing a tiny pinhole. The student placed the flask in boiling water of 100°C until all the air in the flask escaped through the pinhole and all of the liquid was vaporized. He then immersed the flask in cold water to condense the gas. He dried the flask and determined the mass of the condensed vapor. The mass of the condensed vapor was 3.0 grams. What is the molar mass of the liquid?






 
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