Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
How many significant figures are in 0.00230?
💡 Hint: Count the non-zero digits and the trailing zero.
Question 2
Easy
Round the number 3.146 to two decimal places.
💡 Hint: Look at the third decimal place to decide how to round.
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Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
How many significant figures are in the number 0.0405?
- 2
- 3
- 4
💡 Hint: Remember leading zeros do not count.
Question 2
When adding 2.25 and 3.1, what should the final answer be rounded to?
- 5.4
- 5.35
- 5.40
💡 Hint: Look at the decimal places of both numbers.
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Challenge Problems
Push your limits with challenges.
Question 1
Calculate the area of a rectangle where the length is 3.25 m and the width is 2.5 m. Report with significant figures.
💡 Hint: Area is calculated by multiplication; watch how the significant figures limit your answer.
Question 2
When mixed, a solution contains 500 mL of 2.5 M NaCl and 200 mL of 1.0 M NaCl. What is the final concentration?
Provide the answer with correct significant figures.
💡 Hint: Remember to use the correct units and significant figures through your calculations.
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