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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the role of coefficients in a chemical equation?
💡 Hint: Think about how you would represent quantities in a recipe.
Question 2
Easy
Which symbol represents a solid in a chemical equation?
💡 Hint: Remember the states of matter: solid, liquid, gas, and aqueous.
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 must be true for a balanced chemical equation?
- Mass is conserved
- Mass is lost
- Only products are counted
💡 Hint: Think about what happens before and after a reaction.
Question 2
Is it acceptable to change subscripts while balancing an equation?
- True
- False
💡 Hint: What happens if you alter the number of ingredients in a recipe?
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Balance the following reaction: 2 C₆H₁₂ + 7 O₂ → 6 CO₂ + 6 H₂O. Explain the rationale behind each step in the balancing process.
💡 Hint: Take it step by step and write down the counts!
Question 2
For the reaction 4 Fe + 3 O₂ → 2 Fe₂O₃, identify the limiting and excess reagents if 10 grams of Fe and 10 grams of O₂ are mixed. Calculate how much Fe₂O₃ can be produced and the excess left.
💡 Hint: Use molar masses and the ratio from the balanced equation to verify limiting reagents!
Challenge and get performance evaluation