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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is a mole?
💡 Hint: Think about counting atoms like you count oranges!
Question 2
Easy
In the equation 2H₂ + O₂ → 2H₂O, how many moles of Oxygen are needed for every 2 moles of Hydrogen?
💡 Hint: Focus on the coefficients of the 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 does a balanced equation ensure?
- Different number of atoms
- Same number of atoms
- More products than reactants
💡 Hint: Look at the law of conservation.
Question 2
Is Avogadro's number approximately 6.022×10^23?
- True
- False
💡 Hint: This is a key concept in chemistry!
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
In the reaction N₂ + 3H₂ → 2NH₃, if you have 40 grams of N₂ and 10 grams of H₂, which reactant will be limiting and what will be the total mass of ammonia produced?
💡 Hint: Use molar mass conversions and keep track of ratios!
Question 2
A student started with 15 grams of CaCO₃. How many grams of CO₂ can be obtained from its decomposition (CaCO₃ → CaO + CO₂)?
💡 Hint: Think about the balances and convert to moles.
Challenge and get performance evaluation