unit 7 -- Dalton's law

Multiple Choice

Why does the gas pressure increase when the number of particles of the gas increases?

• more collisions will occur inside the container

• the temperature of the container increases

• the gas particles are larger

Drag and Drop

Gas ​

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depends only on the number of ​

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in a given volume and on their average kinetic ​

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. 

Drag these tiles and drop them in the correct blank above

pressure

particles

energy

temperature

Multiple Choice

What is the partial pressure of oxygen in dry air?

• 101.32

• 100.00

• 20.95

• 21.22

Drag and Drop

In a ​

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of gases, the ​

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pressure is the sum of the ​

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pressure of the gases.

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mixture

total

partial

molecular

Draw

How would the symbol for the partial pressure of argon be written?

Multiple Choice

When applying Dalton's law of partial pressures, what variables must remain constant?

• liquid and solid

• mass and volume

• volume and temperature

• mass and density

Multiple Choice

Click the correct statement describing the diagram.

• The pressure of each individual gas was reduced when it was combined to make heliox.

• Each gas in the mixture exerts the pressure it exerted before the gases were mixed.

• The pressure of the oxygen increased when it was combined with the hydrogen.

Multiple Choice

A tank of gases contains a mixture of carbon dioxide, oxygen, and helium. The total pressure in the tank is 500 kPa. If the partial pressure of carbon dioxide is 200 kPa, and the partial pressure of oxygen is 50 kPa, what is the partial pressure of the helium inside the tank?

• 250 kPa

• 500 kPa

• 50 kPa

Multiple Choice

A mixture of krypton gas (Kr), argon gas (Ar), and xenon gas (Xe) is in a closed container. The total pressure in the container is 326 kPa. If the partial pressure of krypton is 42 kPa and the partial pressure of argon is 208 kPa. What is the partial pressure of xenon gas?

• 576 kPa

• 250 kPa

• 326 kPa

• 76 kPa

Multiple Choice

Some lasers rely on a mixture of gases. In one gas laser, a mixture of carbon dioxide (CO₂ ), nitrogen gas (N₂ ), and hydrogen gas (H₂ ) has a total pressure of 1.00 atm. If P_CO2 is 0.39 atm and P_N2 is 0.24 atm, what is the partial pressure of the hydrogen gas?

• 1.63 atm

• 0.37 atm

• 0.63 atm

• 0.92 atm