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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 10 grams of sodium (Na).
💡 Hint: Use the formula number of moles = mass (g) / molar mass (g/mol).
Question 2
Easy
How many molecules are in 0.25 moles of water (H₂O)?
💡 Hint: Remember to multiply moles by Avogadro's number.
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 × 10²²
- 6.022 × 10²³
- 6.022 × 10²⁴
💡 Hint: Think about how we quantify moles in chemistry.
Question 2
True or False: The molar mass of a substance is the same as its atomic mass.
- True
- False
💡 Hint: Consider the units used for each measurement.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
If you have 500 grams of iron (Fe), how many moles is that?
💡 Hint: Refer to the relationship between mass and moles.
Question 2
A chemical reaction produces 3 moles of gas when 6 grams of hydrogen (H₂) reacts. What is the percent yield if the theoretical yield is 5 moles?
💡 Hint: Use the formula for percent yield.
Challenge and get performance evaluation