Stoichiometry and Chemical Equations

Stoichiometry MCQs with Answers

Welcome to the Stoichiometry MCQs with Answers, it helps learners quickly identify areas for improvement in Stoichiometry Online Test.

Stoichiometry is a crucial aspect of chemistry that deals with the quantitative relationships between reactants and products in a chemical reaction. It relies heavily on the concept of balanced chemical equations, which ensure that the number of atoms for each element is conserved during the reaction. To excel in stoichiometry, students often practice with Stoichiometry MCQs with Answers, which help in understanding and applying these relationships.

Balanced Chemical Equations MCQs with Answers are essential for mastering the skill of balancing equations, a fundamental step in any stoichiometric calculation. Once equations are balanced, students can use Mole Ratio MCQs with Answers to practice converting between moles of reactants and products based on these ratios.

Mole-to-Mole Conversions MCQs with Answers focus on these conversions, ensuring that students can accurately determine the amount of one substance needed or produced given a certain amount of another. Similarly, Mass-to-Mass Conversions MCQs with Answers help students practice converting between the mass of reactants and products, using molar masses and balanced equations.

One of the more challenging concepts in stoichiometry is identifying the limiting reactant, the substance that is completely consumed first, limiting the amount of product formed. Limiting Reactant MCQs with Answers provide valuable practice in determining which reactant will limit the reaction and calculating the theoretical yield based on this reactant.

These MCQs not only reinforce theoretical understanding but also prepare students for practical applications in laboratory settings, enhancing their problem-solving skills and conceptual clarity in stoichiometry.

Stoichiometry Online Quiz

By presenting 3 options to choose from, Stoichiometry Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of Stoichiometry Questions and Answers and click over the correct answer.

  • Test Name: Stoichiometry MCQ Quiz Practice
  • Type: Quiz Test
  • Total Questions: 40
  • Total Marks: 40
  • Time: 40 minutes

Note: Answer of the questions will change randomly each time you start the test. Practice each quiz test at least 3 times if you want to secure High Marks. Once you are finished, click the View Results button. If any answer looks wrong to you in Quiz, simply click on question and comment below that question, so that we can update the answer in the quiz section.

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Stoichiometry MCQs

Stoichiometry

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1 / 40

How many grams of water are produced when 2 moles of ethane (C₂H₆) react completely with excess oxygen gas according to the balanced chemical equation 2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O?

2 / 40

The stoichiometric coefficient of a reactant or product in a balanced chemical equation represents the ______.

3 / 40

What is the stoichiometric coefficient of oxygen gas (O₂) in the balanced chemical equation for the combustion of propane (C₃H₈) to produce carbon dioxide and water?

4 / 40

What is the process of determining the amounts of reactants and products in a chemical reaction called?

5 / 40

What is the stoichiometric coefficient of hydrogen gas (H₂) in the balanced chemical equation for the combustion of propane (C₃H₈) to produce carbon dioxide and water?

6 / 40

What is the molar mass of water (H₂O)?

7 / 40

What is the branch of chemistry that deals with the calculation of quantities of substances involved in chemical reactions?

8 / 40

How many grams of ammonia (NH₃) are produced when 4 moles of nitrogen gas react completely with excess hydrogen gas according to the balanced chemical equation N₂ + 3H₂ → 2NH₃?

9 / 40

In a chemical reaction, the starting substances are called ______.

10 / 40

The ratio of the number of moles of each substance in a chemical equation is determined by the ______.

11 / 40

What is the stoichiometric coefficient of propane (C₃H₈) in the balanced chemical equation for its combustion to produce carbon dioxide and water?

12 / 40

How many grams of nitrogen gas are required to react completely with excess hydrogen gas to produce 50 grams of ammonia (NH₃) according to the balanced chemical equation N₂ + 3H₂ → 2NH₃?

13 / 40

How many grams of oxygen gas are required to react completely with 3 grams of ethane (C₂H₆) to produce carbon dioxide and water according to the balanced chemical equation 2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O?

14 / 40

How many grams of oxygen gas are required to react completely with 10 grams of propane (C₃H₈) to produce carbon dioxide and water according to the balanced chemical equation C₃H₈ + 5O₂ → 3CO₂ + 4H₂O?

15 / 40

The stoichiometric ratio of reactants and products in a chemical equation is determined by the ______.

16 / 40

How many moles of oxygen gas are required to produce 2 moles of carbon dioxide according to the balanced chemical equation C₃H₈ + 5O₂ → 3CO₂ + 4H₂O?

17 / 40

How many grams of carbon dioxide (CO₂) are produced when 5 moles of propane (C₃H₈) react completely with excess oxygen gas according to the balanced chemical equation C₃H₈ + 5O₂ → 3CO₂ + 4H₂O?

18 / 40

What is the stoichiometric coefficient of water (H₂O) in the balanced chemical equation for the combustion of ethane (C₂H₆) to produce carbon dioxide and water?

19 / 40

What is the molar mass of carbon dioxide (CO₂)?

20 / 40

How many moles of carbon dioxide (CO₂) are produced when 4 moles of ethane (C₂H₆) react completely with excess oxygen gas according to the balanced chemical equation 2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O?

21 / 40

What is the stoichiometric coefficient of carbon dioxide (CO₂) in the balanced chemical equation for the combustion of methane (CH₄) to produce carbon dioxide and water?

22 / 40

Which unit is used to measure the amount of a substance in chemistry?

23 / 40

The coefficients in a balanced chemical equation represent the ______.

24 / 40

How many moles of methane (CH₄) are needed to produce 4 moles of water according to the balanced chemical equation CH₄ + 2O₂ → CO₂ + 2H₂O?

25 / 40

What is the molar mass of oxygen gas (O₂)?

26 / 40

How many moles of carbon dioxide (CO₂) are produced when 3 moles of ethane (C₂H₆) react completely with excess oxygen gas according to the balanced chemical equation 2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O?

27 / 40

What is the stoichiometric coefficient of ethane (C₂H₆) in the balanced chemical equation for its combustion to produce carbon dioxide and water?

28 / 40

What is the molar mass of methane (CH₄)?

29 / 40

What is the stoichiometric coefficient of water (H₂O) in the balanced chemical equation for the combustion of propane (C₃H₈) to produce carbon dioxide and water?

30 / 40

How many moles of oxygen gas are required to produce 3 moles of water according to the balanced chemical equation 4H₂ + 2O₂ → 4H₂O?

31 / 40

How many moles of carbon dioxide (CO₂) are produced when 2 moles of methane gas (CH₄) react completely with excess oxygen gas according to the balanced chemical equation CH₄ + 2O₂ → CO₂ + 2H₂O?

32 / 40

What is the mass of one mole of a substance called?

33 / 40

How many grams of water are produced when 4 moles of hydrogen gas react completely with excess oxygen gas according to the balanced chemical equation 2H₂ + O₂ → 2H₂O?

34 / 40

Which law states that mass is neither created nor destroyed in a chemical reaction?

35 / 40

What is the molar mass of carbon dioxide (CO₂)?

36 / 40

How many moles of hydrogen gas are required to react completely with 1 mole of oxygen gas to produce water according to the balanced chemical equation 2H₂ + O₂ → 2H₂O?

37 / 40

What is the stoichiometric coefficient of hydrogen gas (H₂) in the balanced chemical equation for the formation of ammonia (NH₃) from nitrogen gas and hydrogen gas?

38 / 40

How many moles of oxygen gas are required to produce 2 moles of water according to the balanced chemical equation 2H₂ + O₂ → 2H₂O?

39 / 40

What is the molar mass of ethane (C₂H₆)?

40 / 40

How many grams of oxygen gas are required to react completely with 5 grams of hydrogen gas to produce water according to the balanced chemical equation 2H₂ + O₂ → 2H₂O? (Assume excess oxygen.)

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Stoichiometry Flashcards

In a chemical reaction, the starting substances are called ______.

Reactants

What is the branch of chemistry that deals with the calculation of quantities of substances involved in chemical reactions?

Stoichiometry

The ratio of the number of moles of each substance in a chemical equation is determined by the ______.

Stoichiometric coefficients

What is the mass of one mole of a substance called?

Molar mass

Which law states that mass is neither created nor destroyed in a chemical reaction?

Law of Conservation of Mass

The coefficients in a balanced chemical equation represent the ______.

Relative amounts of reactants and products

What is the process of determining the amounts of reactants and products in a chemical reaction called?

Stoichiometric calculation

How many moles of hydrogen gas are required to react completely with 1 mole of oxygen gas to produce water according to the balanced chemical equation 2H₂ + O₂ → 2H₂O?

1 mole

The stoichiometric coefficient of a reactant or product in a balanced chemical equation represents the ______.

Relative number of moles

Which unit is used to measure the amount of a substance in chemistry?

Mole

What is the molar mass of water (H₂O)?

18 g/mol

How many moles of oxygen gas are required to produce 3 moles of water according to the balanced chemical equation 4H₂ + 2O₂ → 4H₂O?

1.5 moles

The stoichiometric ratio of reactants and products in a chemical equation is determined by the ______.

Coefficients

What is the molar mass of carbon dioxide (CO₂)?

44 g/mol

How many grams of water are produced when 4 moles of hydrogen gas react completely with excess oxygen gas according to the balanced chemical equation 2H₂ + O₂ → 2H₂O?

72 grams

How many moles of carbon dioxide (CO₂) are produced when 2 moles of methane gas (CH₄) react completely with excess oxygen gas according to the balanced chemical equation CH₄ + 2O₂ → CO₂ + 2H₂O?

2 moles

What is the stoichiometric coefficient of oxygen gas (O₂) in the balanced chemical equation for the combustion of propane (C₃H₈) to produce carbon dioxide and water?

5

How many grams of oxygen gas are required to react completely with 5 grams of hydrogen gas to produce water according to the balanced chemical equation 2H₂ + O₂ → 2H₂O? (Assume excess oxygen.)

80 grams

What is the stoichiometric coefficient of carbon dioxide (CO₂) in the balanced chemical equation for the combustion of methane (CH₄) to produce carbon dioxide and water?

1

How many moles of methane (CH₄) are needed to produce 4 moles of water according to the balanced chemical equation CH₄ + 2O₂ → CO₂ + 2H₂O?

2 moles

What is the molar mass of methane (CH₄)?

16 g/mol

How many grams of ammonia (NH₃) are produced when 4 moles of nitrogen gas react completely with excess hydrogen gas according to the balanced chemical equation N₂ + 3H₂ → 2NH₃?

68 grams

What is the stoichiometric coefficient of hydrogen gas (H₂) in the balanced chemical equation for the combustion of propane (C₃H₈) to produce carbon dioxide and water?

4

How many grams of oxygen gas are required to react completely with 10 grams of propane (C₃H₈) to produce carbon dioxide and water according to the balanced chemical equation C₃H₈ + 5O₂ → 3CO₂ + 4H₂O?

160 grams

What is the stoichiometric coefficient of water (H₂O) in the balanced chemical equation for the combustion of propane (C₃H₈) to produce carbon dioxide and water?

3

How many moles of oxygen gas are required to produce 2 moles of carbon dioxide according to the balanced chemical equation C₃H₈ + 5O₂ → 3CO₂ + 4H₂O?

10 moles

What is the molar mass of oxygen gas (O₂)?

32 g/mol

How many grams of carbon dioxide (CO₂) are produced when 5 moles of propane (C₃H₈) react completely with excess oxygen gas according to the balanced chemical equation C₃H₈ + 5O₂ → 3CO₂ + 4H₂O?

264 grams

What is the stoichiometric coefficient of propane (C₃H₈) in the balanced chemical equation for its combustion to produce carbon dioxide and water?

1

How many moles of carbon dioxide (CO₂) are produced when 3 moles of ethane (C₂H₆) react completely with excess oxygen gas according to the balanced chemical equation 2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O?

6 moles

What is the molar mass of ethane (C₂H₆)?

30 g/mol

How many grams of water are produced when 2 moles of ethane (C₂H₆) react completely with excess oxygen gas according to the balanced chemical equation 2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O?

108 grams

What is the stoichiometric coefficient of water (H₂O) in the balanced chemical equation for the combustion of ethane (C₂H₆) to produce carbon dioxide and water?

6

How many grams of oxygen gas are required to react completely with 3 grams of ethane (C₂H₆) to produce carbon dioxide and water according to the balanced chemical equation 2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O?

84 grams

What is the stoichiometric coefficient of ethane (C₂H₆) in the balanced chemical equation for its combustion to produce carbon dioxide and water?

2

How many moles of carbon dioxide (CO₂) are produced when 4 moles of ethane (C₂H₆) react completely with excess oxygen gas according to the balanced chemical equation 2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O?

8 moles

What is the molar mass of carbon dioxide (CO₂)?

44 g/mol

How many moles of oxygen gas are required to produce 2 moles of water according to the balanced chemical equation 2H₂ + O₂ → 2H₂O?

1 mole

What is the stoichiometric coefficient of hydrogen gas (H₂) in the balanced chemical equation for the formation of ammonia (NH₃) from nitrogen gas and hydrogen gas?

3

How many grams of nitrogen gas are required to react completely with excess hydrogen gas to produce 50 grams of ammonia (NH₃) according to the balanced chemical equation N₂ + 3H₂ → 2NH₃?

6.75 grams

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