Chemical Stoichiometry and Conversion Calculations Quiz

Test your knowledge of stoichiometry with questions on moles, equations, reactions, and conversions. Prepare for chemistry exams!

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What is the definition of stoichiometry?

The study of the properties and behavior of inorganic compounds.

The study of the numerical relationships between reactants and products in chemical reactions.

The study of the behavior of gases under different conditions.

The study of the structure of atoms and molecules.

How many moles are in 36 grams of water (H₂O)?

2 moles

1 mole

0.5 moles

3 moles

What is the molar mass of potassium permanganate (KMnO₄)?

158.04 g/mol

122.55 g/mol

138.03 g/mol

158.03 g/mol

In the reaction 2H₂ + O₂ → 2H₂O, what is the stoichiometric coefficient for oxygen (O₂)?

What is the definition of a mole in chemistry?

A small rodent-like mammal.

A unit used to measure the amount of a substance.

A type of chemical bond.

A measurement of temperature.

Which law states that mass is conserved in a chemical reaction?

Dalton's law

Avogadro's law

Law of conservation of mass

Boyle's law

What is the balanced equation for the combustion of methane (CH₄) in oxygen (O₂)?

CH₄ + O₂ → CO₂ + H₂O

CH₄ + 2O₂ → CO₂ + 2H₂O

CH₄ + 3O₂ → CO₂ + 2H₂O

CH₄ + O₂ → CO + H₂O

What volume of carbon dioxide gas (CO₂) is produced when 100 grams of methane (CH₄) is burned according to the following balanced equation: CH₄ + 2O₂ → CO₂ + 2H₂O? (Assume all gases are at the same temperature and pressure)

22.4 L

44.8 L

33.6 L

56.0 L

What is the limiting reactant when 5 moles of oxygen gas (O₂) react with 3 moles of hydrogen gas (H₂) according to the following balanced equation: 2H₂ + O₂ → 2H₂O?

Oxygen gas (O₂)

Hydrogen gas (H₂)

Water (H₂O)

Both reactants are limiting

#10

How many grams of sulfuric acid (H₂SO₄) are required to neutralize 25.0 grams of sodium hydroxide (NaOH) according to the balanced equation: 2NaOH + H₂SO₄ → Na₂SO₄ + 2H₂O?

49.0 g

98.0 g

24.5 g

74.0 g

#11

How many moles of oxygen gas (O₂) are needed to react completely with 2 moles of hydrogen gas (H₂) according to the balanced equation: 2H₂ + O₂ → 2H₂O?

1 mole

2 moles

3 moles

4 moles

#12

What is the percentage yield if 25 grams of carbon dioxide (CO₂) are produced according to the reaction: C₃H₈ + 5O₂ → 3CO₂ + 4H₂O, and the actual yield is 20 grams?

80%

64%

100%

125%

#13

A reaction produces 30.0 grams of product according to the balanced equation: 2A + 3B → 2C. If 20.0 grams of A and 30.0 grams of B are used as reactants, what is the percent yield?

75%

80%

90%

100%

#14

What volume of hydrogen gas (H₂) is produced at STP when 5.6 grams of zinc (Zn) reacts with excess hydrochloric acid (HCl) according to the following balanced equation: Zn + 2HCl → ZnCl₂ + H₂?

22.4 L

11.2 L

33.6 L

44.8 L

#15

How many grams of calcium carbonate (CaCO₃) are needed to produce 112 grams of calcium oxide (CaO) according to the following balanced equation: CaCO₃ → CaO + CO₂?

112 g

56 g

224 g

168 g