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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is a mole in chemistry?
💡 Hint: Think of how we count large quantities.
Question 2
Easy
Calculate the molar mass of water (H2O).
💡 Hint: Add the atomic masses of hydrogen and oxygen.
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 1 mole contain according to Avogadro's constant?
- 6.022 particles
- 6.022×10²³ particles
- 12 particles
💡 Hint: It's a very large number.
Question 2
The mass of 1 mole of carbon is approximately:
- True
- False
💡 Hint: Check the periodic table for atomic mass.
Solve 3 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A chemist reacts 10 grams of methane (CH4). Calculate the grams of water (H2O) produced in the reaction (balanced: CH4 + 2O2 → CO2 + 2H2O).
💡 Hint: Keep track of your units and remember to balance the equation.
Question 2
A sample of 1.5 moles of potassium chloride (KCl) reacts completely. How many grams of KCl are produced?
💡 Hint: Use the steps: Moles × Molar Mass for conversions.
Challenge and get performance evaluation