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Chapter 8: Q. 8.55 (page 278)

In a gas mixture, the partial pressures are nitrogen 425Torr, oxygen 115Torr, and helium 225Torr. What is the total pressure, in Torr, exerted by the gas mixture?

Short Answer

Expert verified

The total pressure is 765Torr.

Step by step solution

01

Given Information

We need to find the total pressure.

02

Simplify

In a gas, mixture, each gas exerts its partial pressure, which is the pressure it would exert if it were the gas in the container. Dalton's law that the total pressure of a gas mixture is the sum of the partial pressures of the gases in the mixture.

Total pressure is:

Nitrogen isPnit=425Torr

Oxygen isPoxy=115Torr

Helium is Phelium=225Torr

localid="1652623807311" role="math" Ptotal=pnit+Poxy+Phelium=425+115+225=765Torr

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Most popular questions from this chapter

A weather balloon is partially filled with helium to allow for expansion at high altitudes. At STP, a weather balloon is filled with enough helium to give a volume of 25.0L. At an altitude of 30.0kmand -35°C, it has expanded to 2460L. The increase in volume cause it to burst and a small parachute returns the instruments to Earth.

a. How many grams of helium are added to the balloon?

b. What is the final pressure, in millimeters of mercury, of the helium inside the balloon when it bursts?

On a climb up Mt. Whitney, the atmospheric pressure drops to 467 mmHg. What is the pressure in terms of the following units?
a. atm

b. torr

A balloon is filled with helium gas. When each of the following
changes are made at constant temperature, which of the follow-
ing diagrams (A, B, or C) shows the final volume of the
balloon.

a. The balloon floats to a higher altitude where the outside pressure is lower.
b. The balloon is taken inside the house, but the atmospheric pressure does not change.
c. The balloon is put in a hyperbaric chamber in which the pressure is increased.

A sample containing1.50molesofNegas has an initial volume of 8.00L. What is the final volume, in liters, when each of the following occurs and pressure and temperature do not change?

a. A leak allows one-half of Neatoms to escape.

b. A sample of3.50molesofNeis added to the 1.50molesofNegas in the container.

c. A sample of 25.0gof Neis added to the 1.50molesofNegas in the container.

Use the molar volume to calculate each of the following at STP:

a. the number of moles of O2in 44.8 L of O2 gas.

b. the volume in liters, occupied by 2.50 moles of N2 gas.

c. the volume, in liters, occupied by 50.0 g of Ar gas.

d. the number of grams of H2 in 16.20 mL of H2 gas.
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