Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Calculate the percentage uncertainty for a measurement of 100.0 mL with an uncertainty of ±0.2 mL.
💡 Hint: Use the formula: (absolute uncertainty / measured value) x 100.
Question 2
Easy
If a temperature is measured as 30.0 °C with an uncertainty of ±0.5 °C, what is the percentage uncertainty?
💡 Hint: Remember to divide uncertainty by the measured value.
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Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the formula for calculating percentage uncertainty?
- (Absolute Uncertainty / Measured Value) x 100%
- (Measured Value / Absolute Uncertainty) x 100%
- Absolute Uncertainty + Measured Value
💡 Hint: Remember the relationship between uncertainty and measures.
Question 2
True or False: A higher percentage uncertainty indicates a more precise measurement.
- True
- False
💡 Hint: Think about what precision means in terms of measurements.
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Challenge Problems
Push your limits with challenges.
Question 1
You measure a solution's concentration as 0.200 M with an uncertainty of ±0.002 M. Calculate the percentage uncertainty. Then combine this with a volume measurement of 50.0 mL (±0.5 mL) to find the overall uncertainty in the derived molarity for a reaction.
💡 Hint: Remember to apply percentage rules correctly.
Question 2
In a titration experiment, you measure a final volume as 15.00 mL (±0.04 mL). If the initial volume was 10.00 mL (±0.01 mL), calculate the percentage uncertainty for the difference in volume and interpret the precision of your measurements.
💡 Hint: Analyze how uncertainties combine in subtraction.
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