Understanding Gases and Their Behaviors

What analogy is used to explain the behavior of gases?

• A concert

• A football match

• A library

• A state dinner and a child's birthday party

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Who was the first to use real science to describe atoms?

• Isaac Newton

• Albert Einstein

• John Dalton

• Niels Bohr

What did John Dalton's research contribute to?

• The discovery of electrons

• The development of the Law of Multiple Proportions

• The invention of the periodic table

• The formulation of quantum mechanics

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What does the Law of Partial Pressures state?

• The total pressure of a gas is equal to its density times its volume.

• The volume of a gas is inversely proportional to its pressure.

• The pressure of a gas mixture equals the sum of the pressures each gas would exert alone.

• The pressure of a gas is directly proportional to its temperature.

What is the mole fraction symbol represented by?

• Alpha (α)

• Beta (β)

• Gamma (γ)

• Chi (χ)

How is the partial pressure of oxygen in air calculated?

• By adding the pressures of all gases in the air

• By multiplying the total atmospheric pressure by the mole fraction of oxygen

• By subtracting the pressure of nitrogen from the total atmospheric pressure

• By dividing the moles of oxygen by the total moles of air

What is the purpose of collecting gas over water?

• To purify the gas

• To determine the gas's pressure

• To separate the gas from water vapor

• To measure the volume of the gas

What reaction occurs when vinegar meets baking soda?

• Sodium acetate, carbon dioxide, and water are formed

• No reaction occurs

• Hydrochloric acid and sodium hydroxide are formed

• Oxygen and hydrogen gases are released

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What must be subtracted from the total pressure to find the pressure of the collected gas?

• The vapor pressure of the water

• The atmospheric pressure

• The pressure of the container

• The partial pressure of oxygen

How do you calculate the moles of gas collected in an experiment?

• By measuring the gas's color

• By weighing the gas

• By counting the gas molecules

• By using the Ideal Gas Law