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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Calculate the number of moles in 50.0 g of NaCl.
💡 Hint: Use the formula: moles = mass / molar mass.
Question 2
Easy
What is the molar mass of H₂O?
💡 Hint: Add the atomic masses of its constituent atoms.
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 the molar mass of water (H₂O)?
- 16.00 g/mol
- 18.02 g/mol
- 17.00 g/mol
💡 Hint: Remember to add atomic weights of all atoms in the molecule.
Question 2
True or False: A limiting reagent is fully consumed in a reaction.
- True
- False
💡 Hint: Think about which reactant runs out first.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
An experiment produces 7.50 g of NaCl from a reaction. If the theoretical yield is 10.00 g, what is the percent yield?
💡 Hint: Use the percent yield formula.
Question 2
How many liters of oxygen at STP are needed to completely combust 50 g of propane (C₃H₈)?
💡 Hint: Use the ideal gas law where 1 mol of gas occupies 22.4L at STP.
Challenge and get performance evaluation