A mixture of krypton and helium gases at a total pressure of 738 mm Hg contains krypton at a partial pressure of 507 mm Hg. If the gas mixture contains 10.6 grams of krypton, how many grams of helium are present? Mass= g He

A mixture of krypton and helium gases at a total pressure of 738 mm Hg contains krypton at a partial pressure of 507 mm Hg. If the gas mixture contains 10.6 grams of krypton, how many grams of helium are present? Mass= g He

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter8: Properties Of Gases

Section8.7: Kinetic-molecular Theory And The Velocities Of Gas Molecules

Problem 8.12PSP

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Concept explainers

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.

Question

A mixture of krypton and helium gases at a total pressure of 738 mm Hg contains krypton at a partial
pressure of 507 mm Hg. If the gas mixture contains 10.6 grams of krypton, how many grams of helium are
present?
Mass=
g He

The average molecular speed in a sample of Kr gas at a certain temperature is 267 m/s.
The average molecular speed in a sample of CO2 gas is
m/s at the same temperature.

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Step 1: Determine the mass of Helium gas in the mixture average molecular speed of CO2:

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Step 3: (ii) Calculation for average speed of CO2:

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