Significant Figures
What is the result of (2.5 × 3.42) / 1.2 when expressed with correct significant figures?
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About This Question
- Subject
- chemistry
- Chapter
- some basic concepts in chemistry
- Topic
- significant figures
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
7.1
Rule for Multiplication/Division: The result should have the same number of significant figures as the term with the fewest significant figures.
- Analyze Input:
- 2.5 has 2 S.F.
- 3.42 has 3 S.F.
- 1.2 has 2 S.F.
- Calculation: (2.5×3.42)/1.2=7.125.
- Rounding: Must round to 2 S.F.
- Result: 7.1.
This medium difficulty chemistry question is from the chapter some basic concepts in chemistry, covering the topic of significant figures. It appeared in the 2025 exam.
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