An Unknown Liquid Is Vaporized in a 273-ML Flask by Immersion

question 9

Multiple Choice

An unknown liquid is vaporized in a 273-mL flask by immersion in a water bath at 99 $\degree$ C. The barometric pressure is 753 torr. If the mass of the vapor retained in the flask is 1.362 g, what is its molar mass?

• A) 20.4 g/mol
• B) 40.9 g/mol
• C) 112 g/mol
• D) 154 g/mol
• E) 184 g/mol

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