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Calculate the mass % of naphthalene(C10H8) in 50.0g of methanol to obtain a vapor pressure of 118 mmHg. The vapor pressure of methanol, at 298K, is 123.8 mmHg.

Calculate the mass % of naphthalene(C10H8) in 50.0g of methanol to obtain a vapor pressure of 118 mmHg. The vapor pressure of methanol, at 298K, is 123.8 mmHg.

Chemistry
Chemistry
10th Edition
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
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Calculate the mass % of naphthalene(C10H8) in 50.0g of methanol to obtain a vapor pressure of 118 mmHg. The vapor pressure of methanol, at 298K, is 123.8 mmHg.

Expert Solution
Step 1

Given:

The solute is naphthalene(C10H8) and the solvent is methanol(CH3OH).

The pure vapor pressure of methanol, at 298K, PA0 = 123.8 mmHg.

The molar mass of methanol, (M1) = 32 g/mol.

The molar mass of naphthalene, (M2) = 128.17 g/mol.

The given mass of methanol, (m1) = 50 g.

The partial vapor pressure of the methanol, PA = 118 mmHg.

To calculate:

The mass % of naphthalene

 

 

 

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