6. In the molecular weight determination by the Dumas method, as illustrated below, several grams of an organic liquid were drawn into the bulb. The bulb was then immersed in a water bath at 87 C and kept there until all the liquid was vaporized and the air in the bulb was replaced by the vapor. The tip was then sealed shut and the bulb removed from the bath, cooled, dried and weighed at room temperature. The weight of the bulb filled with the vapor was 36.127 g; the weight of the empty (evacuated) bulb was 35.427 g; the bulb's volume was 200.0 mL; room temperature was 25°C; and the barometric pressure was 720 mm Hg. Calculate the molecular weight of the organic liquid.

Question
6. In the molecular weight determination by the Dumas method, as illustrated below,
several grams of an organic liquid were drawn into the bulb. The bulb was then immersed in
a water bath at 87 C and kept there until all the liquid was vaporized and the air in the bulb
was replaced by the vapor. The tip was then sealed shut and the bulb removed from the
bath, cooled, dried and weighed at room temperature. The weight of the bulb filled with the
vapor was 36.127 g; the weight of the empty (evacuated) bulb was 35.427 g; the bulb's
volume was 200.0 mL; room temperature was 25°C; and the barometric pressure was
720 mm Hg. Calculate the molecular weight of the organic liquid.

Image Transcription

6. In the molecular weight determination by the Dumas method, as illustrated below, several grams of an organic liquid were drawn into the bulb. The bulb was then immersed in a water bath at 87 C and kept there until all the liquid was vaporized and the air in the bulb was replaced by the vapor. The tip was then sealed shut and the bulb removed from the bath, cooled, dried and weighed at room temperature. The weight of the bulb filled with the vapor was 36.127 g; the weight of the empty (evacuated) bulb was 35.427 g; the bulb's volume was 200.0 mL; room temperature was 25°C; and the barometric pressure was 720 mm Hg. Calculate the molecular weight of the organic liquid.

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