6. A breathing mixture is prepared in which He is substituted if N2. The gas is 79% He and 21% O2, by volume. (a) What is the density of this mixture in grams per litter at 25°C and 1 atm? (b) At 25°C, what pressure would the He-O2 mixture have the same density as that of air at 25°C and 1 atm? (air composition: 78.08% N2, 20.95%O2, 0.93% Ar, and 0.036% CO2 by volume)

6. A breathing mixture is prepared in which He is substituted if N2. The gas is 79% He and 21% O2, by volume. (a) What is the density of this mixture in grams per litter at 25°C and 1 atm? (b) At 25°C, what pressure would the He-O2 mixture have the same density as that of air at 25°C and 1 atm? (air composition: 78.08% N2, 20.95%O2, 0.93% Ar, and 0.036% CO2 by volume)

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

Chapter5: Gases

Section: Chapter Questions

Problem 160CP: You have an equimolar mixture of the gases SO2 and O2, along with some He, in a container fitted...

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You have an equimolar mixture of the gases SO2 and O2, along with some He, in a container fitted with a piston. The density of this mixture at STP is 1.924 g/L. Assume ideal behavior and constant temperature and pressure. a. What is the mole fraction of He in the original mixture? b. The SO2 and O2 react to completion to form SO3. What is the density of the gas mixture after the reaction is complete?
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