The peak integrations of a chromatogram resulting from a GC analysis of a mixture containing component X and component Y (of a fractional distillation) shows the following data: Component X - Area = 64.3 sq units Component Y - Area = 156.5 sq units What was the percentage composition of the compounds X &Y in the mixture? X= 39.1%, Y= 60.9% X= 29.1%, Y= 70.9% X= 48.1%, Y= 51.9% X= 70.9%, Y= 29.1%

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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The peak integrations of a chromatogram resulting from a GC analysis of a mixture
containing component X and component Y (of a fractional distillation) shows the
following data:
Component X - Area = 64.3 sq units
Component Y - Area = 156.5 sq units
What was the percentage composition of the compounds X & Y in the mixture?
X= 39.1%, Y= 60.9%
X= 29.1%, Y= 70.9%
X= 48.1%, Y= 51.9%
X= 70.9%, Y= 29.1%
Transcribed Image Text:The peak integrations of a chromatogram resulting from a GC analysis of a mixture containing component X and component Y (of a fractional distillation) shows the following data: Component X - Area = 64.3 sq units Component Y - Area = 156.5 sq units What was the percentage composition of the compounds X & Y in the mixture? X= 39.1%, Y= 60.9% X= 29.1%, Y= 70.9% X= 48.1%, Y= 51.9% X= 70.9%, Y= 29.1%
5.20 g of tea leaves were used for the extraction of caffeine in a laboratory experiment, If the mass of crude caffeine obtained and the mass of pure caffeine recovered after recrystallization are 0.166 g
and 0.082 g respectively, what is the percentage yield of pure caffeine from the tea leaves?
O 2.10%
O 2.30%
O 1.58%
O 3.62%
Transcribed Image Text:5.20 g of tea leaves were used for the extraction of caffeine in a laboratory experiment, If the mass of crude caffeine obtained and the mass of pure caffeine recovered after recrystallization are 0.166 g and 0.082 g respectively, what is the percentage yield of pure caffeine from the tea leaves? O 2.10% O 2.30% O 1.58% O 3.62%
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