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.
Correct Answer:
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