Question

the vapor from an unknown volatile liquid occupies a 269 ml. Erlenmeyer flask at 98.7 C and 748 mm Hg. The mass of the vapor is 0.791 g.

A. how many moles of vapor are present?
B. What is the molar mass of the volatile liquid?
a mole of ANY gas (vapor) occupies a volume of 22.4 L at STP
... 0ยบ C and 1.00 atm

A. make the corrections for temperature and pressure to find the moles

B. divide the given mass by the moles from A. to find the molar mass

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