Textbook Question
Measure the length of each of the objects in diagrams (a), (b), and (c) using the metric ruler in the figure. Indicate the number of significant figures for each and the estimated digit for each.
a. <IMAGE>
1. Matter and Measurements
Significant Figures: Precision in Measurements
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What is the correct reading for the liquid in the burette provided below?
A
7 mL
B
7.0 mL
C
7.20 mL
D
7.00 mL
E
6.80 mL
Verified step by step guidance1
Identify the meniscus: Look at the curved surface of the liquid in the burette. The correct reading is taken from the bottom of the meniscus.
Determine the scale increment: Check the markings on the burette to understand the scale. In this image, each small division represents 0.1 mL.
Locate the meniscus level: Observe where the bottom of the meniscus aligns with the scale on the burette. It appears to be between the 6.8 mL and 7.0 mL marks.
Estimate the reading: Since the meniscus is between two markings, estimate the value to the nearest 0.01 mL. The meniscus is closer to the 7.0 mL mark.
Record the reading: Based on the estimation, the correct reading should be recorded as 7.00 mL, considering the precision of the burette.
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