Help determine the molecular weight of this liquid!!!?

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Help determine the molecular weight of this liquid!!!?

5.62 grams of a vapor from a volatile liquid fills a 562 mL flask....If the temp of the boiling water is 98 degrees Celsius, and the atmospheric pressure in the lab was at 777mmHg, determine the molecular weight of the liquid? HELLLP!!!

2007-06-25 09:02:15 · 2 answers · asked by af_woody1892 1 in Science & Mathematics ➔ Chemistry

Um, I am still not sure how you get to the answer...

2007-06-25 09:13:10 · update #1

2 answers

Is easy.
pV= nRT
n = 5.62/Mol Weight
p= (777/760) atm
V= 0.562 mL
T= 371 K
R= 0.082 L-atm/mol-degK

2007-06-25 09:09:12 · answer #1 · answered by cattbarf 7 · 0⤊ 1⤋