Explore BrainMass

# Mole and Weight Percent Composition

Not what you're looking for? Search our solutions OR ask your own Custom question.

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

Gas chromatographic analysis of a mixture of organic compounds gave the following peak areas (sq cm): hexane = 2.7; heptane = 1.6; hexanol = 1.8; toluene = 0.5.

(a) Calculate the mole percent composition of the mixture. Assume that the response of the detector (area per mole) is the same for each component.

(b) Calculate the weight percent composition of the mixture, using the same assumptions as in part A.

https://brainmass.com/chemistry/stoichiometry/26770

#### Solution Preview

(a) Total moles = 2.7 + 1.6 + 1.8 + 0.5 = 6.6 moles

mole percent of hexane = (2.7/6.6)*100 = 40.91%

mole percent of heptane = (1.6/6.6)*100 = 24.24%

mole percent of hexanol = (1.8/6.6)*100 = 27.27%

mole percent of ...

#### Solution Summary

This solution is provided in 218 words. It calculates moles and molar mass to find the mass percentage of the gases.

\$2.49