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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the first step in balancing a chemical equation?
💡 Hint: Think about what must be established before checking the conservation of mass.
Question 2
Easy
In the reaction H2 + O2 = H2O, how many hydrogen atoms do we have on the left side?
💡 Hint: Count the atoms carefully from the reactants.
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
Why is balancing chemical equations necessary?
- A. To create new substances
- B. To follow the law of conservation of mass
- C. Both A and B
💡 Hint: Refer back to the principle of mass you learned.
Question 2
True or False: Only the products in a chemical equation need to be balanced.
- True
- False
💡 Hint: Consider how many reactants exist compared to products.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Balance the following equation: Al + HCl = AlCl3 + H2.
💡 Hint: Start by balancing aluminum first, followed by chlorine.
Question 2
Balance the equation for the complete combustion of propane: C3H8 + O2 = CO2 + H2O.
💡 Hint: Focus on balancing carbon, then hydrogen, leaving oxygen last.
Challenge and get performance evaluation