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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What are substances that go through chemical changes called?
💡 Hint: Think about what starts a chemical reaction.
Question 2
Easy
What do we call new substances formed in a chemical reaction?
💡 Hint: They are the end result of a reaction.
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 are reactants?
- Substances formed from a reaction
- Substances that undergo change
- Substances that do not react
💡 Hint: Think about what you begin with in a chemical process.
Question 2
True or False: A balanced equation has different numbers of atoms on each side.
- True
- False
💡 Hint: Consider the principle of mass conservation in reactions.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Given the reaction between iron and oxygen in moist air, write the balanced equation, and describe the effects of environmental factors on the rate of rusting.
💡 Hint: Consider how the environment plays a role in chemical reactions.
Question 2
Propose a method to demonstrate the formation of a precipitate in a lab setting, and identify the chemicals needed.
💡 Hint: Think of common copper sulfate and the right counteracting solution that leads to insolubility.
Challenge and get performance evaluation