Practice Stoichiometry: The Art of Chemical Accounting - 6.4 | Module 6: Quantitative Chemistry - The Language of Chemical Measurement | IB Grade 9 Chemistry
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6.4 - Stoichiometry: The Art of Chemical Accounting

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What is stoichiometry?

💡 Hint: Think about how we measure ingredients in cooking.

Question 2

Easy

What does a balanced chemical equation ensure?

💡 Hint: Recall how we have to balance both sides in an equation.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What is stoichiometry primarily used for?

  • Measuring temperatures in reactions
  • Calculating amounts of reactants and products
  • Balancing equations

💡 Hint: Think about why chemists care about measuring chemicals.

Question 2

True or False: The coefficients in a balanced equation represent the ratio of masses of the substances.

  • True
  • False

💡 Hint: Remember the difference between moles and mass in stoichiometry.

Solve 1 more question and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

Calculate how many grams of aluminum oxide (Al2O3) can be produced from 10 grams of aluminum reacting with excess oxygen (4Al + 3O2 → 2Al2O3).

💡 Hint: Use molar masses to convert grams to moles.

Question 2

If a reaction yields only 80% of the expected amount, how does this impact the stoichiometry you've calculated? Calculate the expected yield from 50g of CH4 if the complete combustion yields 112.3g of H2O.

💡 Hint: Calculate the percentage yield based on stoichiometric calculations.

Challenge and get performance evaluation