Significant figures Knowledge-Based Practice

Chemistry · Introduction to Chemistry · Chemistry · Measurement & Units

4 Chemistry practice questions on Significant figures. Questions that assess core concepts and understanding.

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Questions

1.
What is the result of the calculation $(15.86 - 15.71) \times 2.458$ reported to the correct number of significant figures?
- A) 0.37
- B) 0.369
- C) 0.3687
- D) 0.4
2.
A student determines the density of an unknown solid by measuring a mass of 45.08 g and a volume of 5.2 mL. What is the density of the solid reported to the correct number of significant figures?
- A) 8.67 g/mL
- B) 8.7 g/mL
- C) 8.669 g/mL
- D) 9 g/mL
3.
A chemist combines three liquid samples with masses measured as 24.32 g, 1.5 g, and 0.082 g. What is the total mass of the mixture reported to the correct number of significant figures?
- A) 25.90 g
- B) 25.9 g
- C) 25.902 g
- D) 26 g
4.
Which of the following recorded measurements contains exactly four significant figures?
- A) 0.02040 g
- B) 0.00204 g
- C) 0.00024 g
- D) 0.20400 g

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