Name ________________
Moles Volume Relationship
Date:_________________
1. Which rigid cylinder contains the same number of gas molecules at STP as a 2.0-liter rigid cylinder
containing H 2(g) at STP?
1) 1.0-L cylinder of O 2(g)
2) 2.0-L cylinder of CH 4(g)
3) 1.5-L cylinder of NH3(g)
4) 4.0-L cylinder of He(g)
2. Which two samples of gas at STP contain the same total number of molecules?
1) 1 L of CO(g) and 0.5 L of N2(g)
2) 2 L of CO(g) and 0.5 L of NH 3(g)
3) 1 L of H2(g) and 2 L of Cl2(g)
4) 2 L of H 2(g) and 2 L of Cl 2(g)
3. The table below shows data for the temperature, pressure, and volume of four gas samples.
Which two gas samples have the same total number of molecules?
1) A and B
2) A and C
3) B and C
4) B and D
4. The data table below gives the temperature and pressure of four different gas samples, each in a 2-liter
container.
Which two gas samples contain the same total number of particles?
1) CH 4 and CO 2
2) CH 4 and Ne
3) He and CO2
4) He and Ne
5. A sample of oxygen gas is sealed in container X. A sample of hydrogen gas is sealed in container Z. Both
samples have the same volume, temperature, and pressure. Which statement is true?
1)
2)
3)
4)
Container X contains more gas molecules than container Z.
Container X contains fewer gas molecules than container Z.
Containers X and Z both contain the same number of gas molecules.
Containers X and Z both contain the same mass of gas.
6. Each stoppered flask below contains 2 liters of a gas at STP.
Each gas sample has the same
1) density
2) mass
3) number of molecules
4) number of atoms
7. A 10.-liter flask at a given temperature and pressure contains 6.0 × 10 23 molecules of hydrogen gas. Under
the same conditions of temperature and pressure, how many molecules would a 10.-liter flask of nitrogen
gas contain?
1) 1.0 × 10 23
2) 6.0 × 10 23
3) 1.0 × 10 24
4) 6.0 × 10 24
8. Equal volumes of all gases at the same temperature and pressure contain an equal number of
1) molecules
2) atoms
3) electrons
4) protons
Chemistry!
Moles Volume Relationship
9. The diagrams below represent three 1-liter containers of gas, A, B, and C. Each container is at STP.
Which statement correctly compares the number of molecules in the containers?
1)
2)
3)
4)
Container A has the greatest number of molecules.
Container B has the greatest number of molecules.
Container C has the greatest number of molecules.
All three containers have the same number of molecules.
Chemistry!
Answer Key
Avagadros Hypothesis
1.
2
2.
4
3.
2
4.
2
5.
3
6.
3
7.
2
8.
1
9.
4
Chemistry!