As a Summer Intern at the National Institute of Standards

question 40

Multiple Choice

As a summer intern at the National Institute of Standards and Technology, a student performed three measurements to determine the density of water at 25°C to four significant figures. She obtained the following results. The known density of water at 25°C to three significant figures is 0.958 g/mL. Trial Density (g/mL)
1 0) 9345
2 0) 9523
3 0) 9107
The measurements were __________

• A) sufficiently precise but not accurate.
• B) sufficiently accurate but not precise.
• C) both sufficiently precise and accurate.
• D) neither sufficiently precise nor accurate.
• E) not repeated an adequate number of times.

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