Use a periodic table to complete this review. DO NOT use a calculator, since you are not allowed one on tests and quizzes.

Standards

Students know one mole equals 6.02 x 10^{23} particles (atoms or molecules).

Students know how to determine the molar mass of a molecule from its chemical formula and a table of atomic masses and how to convert the mass of a molecular substance to moles, number of particles, or volume of gas at standard temperature and pressure.

What is the mass of two moles of propane gas, C_{3}H_{8}?

44 grams

88 grams

22 grams

11 grams

How many moles of propane gas, C_{3}H_{8}, are contained in 11 grams of the gas at standard conditions?

0.25 moles

1.5 x 10^{23} moles

4 moles

11 x 10^{23} moles

What is the mass in grams of 3 moles of water molecules, H_{2}O?

54 grams

6 grams

0.166 grams

21 grams

How many moles of water molecules, H_{2}O, are present in a 27 gram sample of water?

2 moles

2/3 mole

1.5 moles

9 x 10^{23} moles

What is the mass in grams of 10 moles of ammonia, NH_{3}?

1.7 grams

170 grams

0.587 grams

27 grams

What is the mass of 4 moles of hydrogen molecules (H_{2})?

0.5 grams

8 grams

2 grams

4 grams

How many moles of methane molecules, CH_{4}, are in 80 grams of methane?

0.201 moles

5 moles

80 x 10^{23} moles

6.02 x 10^{80} moles

What volume would be occupied by two moles of propane gas, C_{3}H_{8}, at standard conditions?

44.8 liters

88 liters

22. 4 liters

11.2 liters

What volume is occupied by 4 moles of hydrogen molecules (H_{2}) at standard conditions?

89.6 liters

72 liters

5.6 liters

2.4 x 10^{24} molecules

What volume is occupied by 10 moles of ammonia, NH_{3}, at standard conditions?

170 liters

6 x 10^{24} liters

224 liters

32.4 moles

How many moles of methane gas molecules, CH_{4}, are in 11.2 liters of methane at standard conditions?

0.5 moles

11.2 moles

27.2 moles

179.2 moles

How many moles of argon gas (Ar) are present in 5.6 liters of argon gas at standard conditions?

0.25 moles

5.6 moles

4 moles

28 moles

How many molecules are contained in 3 moles of water molecules, H_{2}O?

54 molecules

6 molecules

1.8 x 10^{24} molecules

3 x 10^{23} molecules

A sample of carbon dioxide gas (CO_{2}) contains 6 x 10^{22} molecules. How many moles of carbon dioxide does this represent?

1/10 mole

10 moles

4.4 moles

440 moles

How many moles of hydrogen molecules (H_{2}) are present in 9 x 10^{23} molecules of hydrogen?

9 x 10^{23} moles

1.5 moles

1.8 x 10^{24} moles

4.5 x 10^{23} mole

How many molecules of ammonia are contained in 10 moles of ammonia, NH_{3}?

6 x 10^{24} molecules

6 x 10^{22} molecules

170 molecules

27 molecules

What is the volume occupied by 40 grams of argon gas (Ar) at standard conditions?

1 liter

22.4 liters

6.02 x 10^{23} liters

896 liters

What volume, in liters, is occupied by 1.5 x 10^{23} atoms of argon gas (Ar) at STP?

0.250 liters

1.5 x 10^{23} liters

5.6 liters

89.6 liters

How many molecules of ethane gas, C_{2}H_{6} are in 15 grams of the compound?

0.5 molecules

2 molecules

3 x 10^{23} molecules

45 molecules

What is the mass, in grams, of 3 x 10^{23} atoms of helium?

1.2 x 10^{24} grams

3 x 10^{23} grams

2 grams

8 grams

Approximately how many atoms of carbon are present in a 120 gram sample of carbon?

6 x 10^{24} atoms

6 x 10^{22} atoms

10 atoms

1440 atoms

What volume would be occupied by 120 grams of argon gas (Ar) at standard conditions?