11.1.4 - Quantifying Uncertainty in Reported Measurements
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Practice Questions
Test your understanding with targeted questions
What is absolute uncertainty?
💡 Hint: Think about how a ruler marks measurements.
If a graduated cylinder shows 25.0 mL with a scale of 0.1 mL, what is the absolute uncertainty?
💡 Hint: Use half of the smallest division.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does absolute uncertainty represent?
💡 Hint: Think about how we express measurements.
True or False: Percentage uncertainty allows comparison of measurements with different units.
💡 Hint: Percentage uncertainty is uniform for direct comparisons.
1 more question available
Challenge Problems
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You measure the mass of a chemical as 15.0 ± 0.1 g and the volume as 20.0 ± 0.2 mL. Calculate the density and the associated uncertainty.
💡 Hint: Use the techniques for propagation of uncertainties learned earlier!
A reaction produces a gas whose volume is recorded as 30.0 ± 0.5 mL every minute for 5 minutes. Calculate the total volume produced and its uncertainty.
💡 Hint: Remember to multiply for the total but pay attention to how the uncertainty adds up!
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