Question detail
What is the mean of the following measurements: 10.0 g, 10.5 g, 9.5 g?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations
Question
- A. 10.0 g
- B. 10.2 g
- C. 10.5 g
- D. 9.5 g
Answer
10.0 g
Explanation
The mean is calculated by adding all measurements (10.0 + 10.5 + 9.5 = 30.0 g) and dividing by the number of measurements (30.0 g / 3 = 10.0 g).
Common mistake
Misunderstanding Range Calculation
Students often calculate the range by subtracting the smallest measurement from the largest without considering the mean.
To correctly use the range as a measure of uncertainty, calculate the mean of the measurements first, then determine the range by finding the difference between the highest and lowest values. Keep the correction anchored to Chemical measurements; check formula, substitution, calculation, final answer, and unit where relevant.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.