Professional Courses
Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.
Categories
Interactive Games
Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
Typing
Memory
Math
English Adventures
Knowledge
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is one mole equal to in terms of particles?
💡 Hint: Remember the name associated with this number.
Question 2
Easy
What is the molar mass of carbon dioxide (CO₂)?
💡 Hint: Calculate using the atomic masses from the periodic table.
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 Avogadro's number?
- 6.022 x 10²³
- 3.014 x 10²²
- 1.2 x 10²⁵
💡 Hint: It's the foundational number in the mole concept.
Question 2
Stoichiometry involves which of the following?
- True
- False
💡 Hint: Consider what stoichiometry means in terms of chemical reactions.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A researcher combines 10 grams of magnesium with 20 grams of hydrochloric acid. Determine the limiting reactant and how much hydrogen gas can be produced.
💡 Hint: Just balance the reaction and calculate moles of each reactant.
Question 2
Calculate the volume of gas produced when 4 moles of ethylene (C₂H₄) reacts with 5 moles of oxygen (O₂) in the reaction: 2C₂H₄ + 7O₂ → 4CO₂ + 6H₂O.
💡 Hint: Remember to account for gases at STP when using our volume conversions.
Challenge and get performance evaluation