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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is Avogadro's constant?
💡 Hint: Think of how many atoms are in one mole of carbon.
Question 2
Easy
How is molar mass derived for elements?
💡 Hint: Look at how the periodic table lists atomic masses.
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 is the molar mass of water (H₂O)?
- 18.02 g/mol
- 16.00 g/mol
- 20.00 g/mol
💡 Hint: Check the values of Hydrogen and Oxygen from the periodic table.
Question 2
Avogadro's constant is approximately equal to:
- True
- False
💡 Hint: Remember what a mole represents.
Solve 3 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You need to produce 2 moles of water from H₂ + O₂, but you start with 1 mole of H₂ and 1 mole of O₂. How many moles of water can you actually produce?
💡 Hint: Calculate the ratio required for complete reaction.
Question 2
Given a 100 g sample containing 40% carbon, what is the mass of carbon in the sample? Additionally, what is the number of moles of carbon?
💡 Hint: Take 40% of 100 g to find mass first, then use molar mass to find moles.
Challenge and get performance evaluation