Avogadro's Law

Which has more molecules?

• mole H₂O

• mole Al(OH)₃

• mole NaCl

• There are all the same

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NGSS.HS-PS1-7

There are 40 liters of helium in a balloon at 100 K. If the temperature of the balloon is increased to 200 K, what will the new volume of the balloon be?

• 80 L

• 45 L

• 54 L

• 45.33 L

Which of the following statements best describes Avogadro's Law?

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

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

• The volume of a gas is directly proportional to the number of moles at constant temperature and pressure.

• The volume of a gas is inversely proportional to the number of moles at constant temperature and pressure.

If 2 moles of nitrogen gas occupy a volume of 10 liters at a certain temperature and pressure, what volume will 4 moles of nitrogen gas occupy under the same conditions?

• 5 liters

• 10 liters

• 20 liters

• 40 liters

A balloon is filled with 1 mole of oxygen gas at a certain temperature and pressure. If the amount of gas is doubled, what happens to the volume of the balloon?

• The volume is halved.

• The volume remains the same.

• The volume doubles.

• The volume quadruples.

Which of the following experiments would demonstrate Avogadro's Law?

• Measuring the pressure of a gas as its temperature changes.

• Measuring the volume of a gas as the number of moles changes.

• Measuring the temperature of a gas as its volume changes.

• Measuring the pressure of a gas as its volume changes.

In a closed container, the volume of a gas is increased while keeping the temperature constant. According to Avogadro's Law, what must happen to the number of moles of gas?

• The number of moles must decrease.

• The number of moles must increase.

• The number of moles must remain constant.

• The number of moles must double.

A gas cylinder contains 3 moles of helium gas at a volume of 15 liters. If the volume is increased to 30 liters, how many moles of helium gas are present?

• 1.5 moles

• 3 moles

• 6 moles

• 9 moles

Which real-world application relies on Avogadro's Law?

• Calculating the pressure of a gas in a tire.

• Determining the volume of gas needed to inflate a balloon to a certain size.

• Measuring the temperature of a gas in a weather balloon.

• Calculating the density of a gas in a container.

If the volume of a gas is 50 liters with 2 moles of gas, what will be the volume if the moles are increased to 5, keeping temperature and pressure constant?

• 20 liters

• 50 liters

• 100 liters

• 125 liters