5.4 - Chemical Formulae
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 does H₂O represent?
💡 Hint: Think about the common substances you know.
How many atoms of oxygen are in carbon dioxide?
💡 Hint: Look closely at the subscript in the formula.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What does the formula H₂O represent?
💡 Hint: Think of the liquid we drink every day.
Valency refers to the number of atoms in a molecule.
💡 Hint: Remember what valency indicates about an atom's behavior.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
Given the compounds Na₂S and CaCl₂, determine the number of individual ions present in each compound.
💡 Hint: Consider the subscript in each compound for ion count.
Construct the formula for a compound formed between aluminum (Al) and the sulfate radical (SO₄²⁻).
💡 Hint: Use the criss-cross method to balance the ions.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.