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A solution of pentane and ethanol CH3CH2OH that is 50.% pentane by mass is boiling at...

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Chemistry

A solution of pentane and ethanol CH3CH2OH that is 50.% pentaneby mass is boiling at 57.2°C. The vapor is collected and cooleduntil it condenses to form a new solution.

Calculate the percent by mass of pentane in the new solution.Here's some data you may need:

normal boiling pointdensityvapor pressure at

57.2°C

pentane

36.°C

0.63gmL

1439.torr

ethanol

78.°C

0.79gmL

326.torr

Be sure your answer has the correct number of significantdigits.

Note for advanced students: you may assume the solutionand vapor above it are ideal.

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