Avogadro's Law

Which sample of argon gas has the same number of atoms as a 100.-milliliter sample of helium gas at 1.0 atm and 300. K?

• 50. mL at 1.0 atm and 300. K

• 50. mL at 0.5 atm and 300. K

• 100. mL at 0.5 atm and 300. K

• 100. mL at 1.0 atm and 300. K

At STP, which gas sample has the same number of molecules as 2.0 liters of CH4(g) at STP?

• 1.0 liter of C2H6(g)

• 2.0 liters of O2(g)

• 5.0 liters of N2(g)

• 6.0 liters of CO2(g)

At STP, which gaseous sample has the same number of molecules as 3.0 liters of N2 (g)?

• 6.0 L of F2 (g)

• 4.5 L of N2 (g)

• 3.0 L of H2 (g)

• 1.5 L of Cl2 (g)

At STP, which sample contains the same number of molecules as 3.0 liters of H2(g)?

• 1.5 L of NH3(g)

• 2.0 L of CO2(g)

• 3.0 L of CH4(g)

• 6.0 L of N2(g)

A closed container holds 3.0 moles of CO2 gas at STP. What is the total number of moles of Ne(g) that can be placed in a container of the same size at STP?

• 1.0 mole

• 1.5 moles

• 3.0 moles

• 0.0 moles

Which rigid cylinder contains the same number of gas molecules at STP as a 2.0-liter rigid cylinder containing H2(g) at STP?

• 1.0-L cylinder of O2(g)

• 2.0-L cylinder of CH4(g)

• 1.5-L cylinder of NH3(g)

• 4.0-L cylinder of He(g)

Which two gas samples have the same total number of molecules?

• A and B

• A and C

• B and C

• B and D

At the same temperature and pressure, 1.0 liter of CO(g) and 1.0 liter of CO2(g) have

• equal masses and the same number of molecules

• different masses and a different number of molecules

• equal volumes and the same number of molecules

• different volumes and a different number of molecules

Compare the mass of the original 200-milliliter sample of CO₂(g) to the mass of the CO₂(g) sample when the cylinder is adjusted to a volume of 100 milliliters.

State, in terms of both the frequency and force of collisions, what would result from decreasing the temperature of the original sample of CO₂(g), at constant volume.