4.5.2 - Counting Atoms in a Chemical Formula
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
How many hydrogen atoms are in H₂O?
💡 Hint: Look at the subscript next to H.
What does a lack of subscript after an element indicate?
💡 Hint: Consider the meaning of subscripts.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What does the subscript 2 in H₂O represent?
💡 Hint: Focus on the subscript next to H.
True or False: In C₆H₁₂O₆, the number of oxygen atoms is 6.
💡 Hint: Recheck the subscript for the oxygen atom.
Get performance evaluation
Challenge Problems
Push your limits with advanced challenges
Count the total number of atoms in Fe₂(SO₄)₃.
💡 Hint: Don't forget to consider the subscripts for sulfate, which has 4 oxygen atoms.
If you have 3 moles of (NH₄)₂SO₄, how many nitrogen atoms are there?
💡 Hint: Use the number of nitrogen atoms per formula unit as a starting point.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.