Answered: Determine both the empirical and…

Chemistry by OpenStax (2015-05-04)

1st Edition

ISBN:9781938168390

Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Chapter9: Gases

Section: Chapter Questions

Problem 95E: A 1-L sample of CO initially at STP is heated to 546 K. and its volume is increased to 2 L. (a) What...

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A volatile hydrocarbon was determined to be 92.3% carbon, by mass. In a separate experiment, utilizing the Dumas method, 4.00 mL pure liquid sample of this hydrocarbon is vaporized in an Erlenmeyer flask when the barometric pressure is 768.0 torr. The empty flask was fitted with a foil cap pierced with a pinhole and weighed 25.3478 g. After the excess gas escaped, the temperature was measured as 98.0 C. The flasj and contents is found to be 25.6803 g. The exact volume of the flask was determined to be 128.5mL. Determine both the empirical and molecular formula of this hydrocarbon.

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