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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is one mole of any substance equal to?
💡 Hint: Think of a specific constant in chemistry.
Question 2
Easy
Define molar mass.
💡 Hint: It connects mass with moles.
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 10²²
- 6.022 x 10²³
- 6.022 x 10²⁴
💡 Hint: This is a key constant in chemistry.
Question 2
True or False: One mole of any gas occupies 22.4 liters at STP.
- True
- False
💡 Hint: Think about gas volumes at STP.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
If 50 grams of magnesium (Mg) are needed to react completely with 80 grams of oxygen (O₂), determine the limiting reactant based on their molar masses (Mg = 24.3 g/mol, O₂ = 32 g/mol).
💡 Hint: Check the stoichiometric ratios and relate them to the moles calculated.
Question 2
Calculate the mass needed to produce 5 moles of water (H₂O) given the molar mass of water is 18 g/mol.
💡 Hint: Use the molar mass relationship to find the required mass.
Challenge and get performance evaluation