73. A 500.-mL sample of O2 gas at 24 °Cwas prepared by decomposing a 3%aqueous solution of hydrogen peroxide,H2 O2, in the presence of a small amountof manganese catalyst by the reaction2H2 O2 (aq) → 2H2O (g) +The oxygen thus prepared wascollected by displacement of water. Thetotal pressure of gas collected was755 mm Hg. What is the partial pressureof O2 in the mixture? How many molesof O2 are in the mixture? (The vaporpressure of water at 24 °C is 23 mm Hg.)

Total pressure = 755 mm Hg Vapor pressure of water =23 mm Hg Partial pressure of O2 (PO2) = Total…

Answered: How many moles re? (The vapor

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How many moles re? (The vapor

Chemistry: An Atoms First Approach

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Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter19: The Representative Elements

Section: Chapter Questions

Problem 92CWP

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Concept explainers

Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.

Question

73. A 500.-mL sample of O2 gas at 24 °C
was prepared by decomposing a 3%
aqueous solution of hydrogen peroxide,
H2 O2, in the presence of a small amount
of manganese catalyst by the reaction
2H2 O2 (aq) → 2H2O (g) +
The oxygen thus prepared was
collected by displacement of water. The
total pressure of gas collected was
755 mm Hg. What is the partial pressure
of O2 in the mixture? How many moles
of O2 are in the mixture? (The vapor
pressure of water at 24 °C is 23 mm Hg.)

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