Avogadro's Gas Law

How many molecules are there in a 110 L sample of gas at STP?

• 8 x 10²³ molecules

• 8 x 10²⁴  molecules

• 3 x 10²⁴ molecules

• 3 x 10²³ molecules

A sample of carbon dioxide at STP is 0.50 L.  How many grams of carbon dioxide do we have?

• 0.48 g

• 0.49 g

• 1.96 g

• 0.98 g

What is the new volume of the gas if the pressure on 350 L of oxygen at 720 mm Hg is decreased to 600 mm Hg?

• 420 L

• 29.16 L

• 4200.0 L

• 291.6 L

What is Avogadro's Gas Law?

• It states that equal volumes of gases at the same temperature and pressure contain equal numbers of molecules.

• It states that the pressure of a gas is directly proportional to its temperature.

• It states that the volume of a gas is inversely proportional to its pressure.

• It states that the energy of a gas is directly proportional to its temperature.

If 2.0 moles of nitrogen gas occupy a volume of 44.8 L at STP, how many moles of oxygen gas will occupy the same volume under the same conditions?

• 1.0 mole

• 2.0 moles

• 3.0 moles

• 4.0 moles

A sample of gas occupies 10.0 L at 1 atm. According to Avogadro's Law, what will be the volume if the amount of gas is doubled while the temperature and pressure remain constant?

• 5.0 L

• 10.0 L

• 20.0 L

• 40.0 L

Which of the following is a real-world application of Avogadro's Gas Law?

• Calculating the amount of gas needed to fill a balloon to a certain volume.

• Determining the boiling point of a liquid.

• Measuring the density of a solid.

• Finding the melting point of a metal.

How does Avogadro's Gas Law help in determining the molecular weight of a gas?

• By comparing the volume of the gas to a known standard.

• By measuring the pressure of the gas.

• By calculating the temperature of the gas.

• By using the number of moles and the volume of the gas.

What happens to the volume of a gas when the number of moles is halved, according to Avogadro's Law, assuming constant temperature and pressure?

• The volume doubles.

• The volume remains the same.

• The volume is halved.

• The volume quadruples.

If 1 mole of hydrogen gas occupies 22.4 L at STP, what volume will 3 moles of hydrogen gas occupy under the same conditions?

• 22.4 L

• 44.8 L

• 67.2 L

• 89.6 L