4 - Chemical Reactions and Equations
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
What type of change is melting ice?
💡 Hint: It's when the form changes but not the identity.
What does a chemical equation represent?
💡 Hint: Think of it as a recipe for a reaction.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What type of change involves the creation of a new substance?
💡 Hint: Consider what happens when wood burns.
True or False: Physical changes cannot be reversed.
💡 Hint: Think of melting ice - can it become solid again?
2 more questions available
Challenge Problems
Push your limits with advanced challenges
Balance the given equation and explain the significance of balancing in chemical reactions: C3H8 + O2 → CO2 + H2O.
💡 Hint: Consider the number of carbons and hydrogens in propane.
Predict the product(s) and type of reaction: Na + Cl2 → ?
💡 Hint: Look at the elements and what they combine to form.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.