Practice Rules for Significant Figures in Calculations - 11.2.3 | Chapter 11: Measurement and Data Processing | IB Grade 12-Chemistry
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11.2.3 - Rules for Significant Figures in Calculations

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

Find the number of significant figures in 0.00650.

💡 Hint: Count only the non-zero digits and sandwich zeros.

Question 2

Easy

Round 7.891 to two significant figures.

💡 Hint: Look at the digit after the second figure.

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 are significant figures?

  • Digits contributing to measurement precision
  • Only whole numbers
  • All numbers regardless of value

💡 Hint: Think about what contributes to precision in a measurement.

Question 2

When multiplying numbers, how do you determine the number of significant figures in the answer?

  • Based on decimal places
  • Based on the largest number
  • Based on the measurement with the fewest significant figures

💡 Hint: Focus on the rules of multiplication.

Solve 2 more questions and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

A chemist measures two solutions: 2.55 mL and 1.5 mL. What is the total volume rounded to the correct significant figures?

💡 Hint: Consider the significant figures of each measurement.

Question 2

If you multiply 4.00 m by 3.6 m and then subtract 2.0 m², what is your final area rounded appropriately?

💡 Hint: Calculate then round according to the significant figures.

Challenge and get performance evaluation