What mass in grams of glucose (MM = 180.2 g/mol) would need to be dissolved in 100.0 g of water to decrease the vapor pressure of the solution to 22.0 torr? (P° of water is 23.5 torr)

Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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What mass in grams of glucose (MM = 180.2 g/mol) would need to be dissolved in 100.0 g of water to decrease the vapor pressure of the solution to 22.0 torr? (P° of water is 23.5 torr)
 
 
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Step 1 Roult's law

To solve this problem we will use Roult's law as the solute glucose in non-volatile 

Using this first we calculate mole fraction of glucose then by using this mole fraction we will calculate the number of mole glucose needed 

And hence we will able to calculate the mass of glucose needed.

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