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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is a chemical equation?
💡 Hint: Think about how equations represent numbers.
Question 2
Easy
List the reactants in the equation: 2H₂ + O₂ → 2H₂O.
💡 Hint: Look for the substances on the left side.
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 does a chemical equation represent?
- Physical change
- Chemical reaction
- Both
💡 Hint: Focus on what changes in chemical composition.
Question 2
True or False: Balancing a chemical equation is necessary to show the conservation of mass.
- True
- False
💡 Hint: Consider what happens to atoms during reactions.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Balance the combustion reaction of ethane (C₂H₆): C₂H₆ + O₂ → CO₂ + H₂O and explain your balancing process.
💡 Hint: Start with the most complex molecule first and work your way through.
Question 2
Given the reaction: Na + Cl₂ → NaCl, discuss how you would balance it and the rationale behind it.
💡 Hint: Consider the total number of atoms of each element.
Challenge and get performance evaluation