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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
How many atoms are in the formula H₂O?
💡 Hint: Count the subscripts.
Question 2
Easy
In the formula CO₂, how many oxygen atoms are there?
💡 Hint: Look at the subscript after the O.
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 does a subscript indicate in a chemical formula?
- The number of molecules
- The number of atoms of an element
- The total charge of the molecule
💡 Hint: Think about what each part of the formula represents.
Question 2
True or False: The absence of a subscript after an element means there is one atom of that element.
- True
- False
💡 Hint: Recall how we interpret chemical formulas.
Solve 3 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Given the formula C₄H₁₀, calculate the total number of atoms and explain your reasoning.
💡 Hint: Break it down by each type of atom.
Question 2
In the formula Ca(OH)₂, what is the total number of atoms, and how do you arrive at that number?
💡 Hint: Consider both the single elements and the group in parentheses.
Challenge and get performance evaluation