To the nearest $$0.01 \ \text{cm}$$

Question 1

Which of the following measurements has the greatest number of significant figures?

Accepted Answer

$$3.20 \ 	ext{cm}$$

Question 2

Why is a measurement of $$25.00 \ 	ext{mL}$$ considered more precise than $$25 \ 	ext{mL}$$?

Accepted Answer

Because it has more significant figures, indicating a more precise measurement.

Question 3

When recording a measurement, what must you always include?

Accepted Answer

All known digits plus one estimated digit.

Question 4

A student measures the length of a pencil and records it as $$9.0 \ 	ext{cm}. $$How many significant figures are in this measurement?

Accepted Answer

2

Question 5

Which of the following best describes the 'eyeball test' in measurement?

Accepted Answer

Estimating the last digit based on visual judgment.

Question 6

Given the burette reading in the image, what is the correct value to record?

Accepted Answer

$$6.80 \ 	ext{mL}$$

Question 7

If a ruler is marked every $$0.1 \ 	ext{cm}$$, to what decimal place should you record your measurement?

Accepted Answer

To the nearest $$0.01 \ 	ext{cm}$$

Question 8

A student records the mass of a sample as $$8.00 \ 	ext{g}. $$Which of the following statements is true?

Accepted Answer

The measurement has 3 significant figures.

Question 9

Which of the following is the correct way to report a measurement if the smallest division on your instrument is $$0.1$$ units?

Accepted Answer

Report to the nearest $$0.01$$ units.

Question 10

A student measures the volume of a liquid as $$6.80 \ 	ext{mL}. $$Which digit is considered the estimated digit?

Accepted Answer

0

Question 11

Why is it important to include one estimated digit when recording a measurement?

Accepted Answer

It reflects the precision of the measuring instrument.

Question 12

If a measurement is recorded as $$3.200 \ 	ext{cm}$$, how many significant figures does it have?

Accepted Answer

4

Question 13

A student reads a thermometer and records the temperature as $$25.0 \ ^\circ 	ext{C}. $$What does the zero in the tenths place indicate?

Accepted Answer

It is an estimated digit, showing the measurement's precision.

Question 14

Which of the following best explains why $$3.20 \ 	ext{cm} is $$more precise than $$3.2 \ 	ext{cm}$$?

Accepted Answer

It has more significant figures, indicating a more precise measurement.

Question 15

A student measures a pencil and records $$9.0 \ 	ext{cm}. $$Which of the following is true about this measurement?

Accepted Answer

The zero is significant and indicates the precision of the measurement.

Significant Figures and Measurement Recording in Chemistry

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