$$\frac{60 \text{ sec}}{1 \text{ min}}$$

$$(1 \text{ m}^3 = 10^6$ \text{ cm}^3)$$

Question 1

Which of the following best explains why the measurement '52.8' is considered incomplete in a scientific context?

Accepted Answer

It lacks a unit, making the value ambiguous.

Question 2

A student measures the mass of a sample as 0.080 g. How many significant figures does this measurement have?

Accepted Answer

3

Question 3

Which of the following numbers contains four significant figures?

Accepted Answer

23.50

Question 4

A graduated cylinder is used to measure the volume of a liquid. The reading is 22.0 mL. How many significant figures are in this measurement?

Accepted Answer

3

Question 5

Which of the following is the correct way to round 4.1278 to three significant figures?

Accepted Answer

4.13

Question 6

When multiplying 13.91 m by 23.3 m, which rule determines the number of significant figures in the answer?

Accepted Answer

The number with the fewest significant figures.

Question 7

Express 26,800,000,000,000,000,000,000 in scientific notation with three significant figures.

Accepted Answer

$$2.68 	imes 10$$^{22}$$

Question 8

Which SI prefix corresponds to a multiplier of $$10^{-6}$$?

Accepted Answer

micro-

Question 9

A student wants to convert 3.55 minutes to seconds. Which conversion factor should be used to ensure the units cancel correctly?

Accepted Answer

$$\frac{60 	ext{ sec}}{1 	ext{ min}}$$

Question 10

If a measurement is recorded as 2788 g and must be rounded to two significant digits, what is the correct result?

Accepted Answer

2800 g

Question 11

Which of the following best describes the concept of density?

Accepted Answer

The ratio of the mass of a substance to the volume it occupies.

Question 12

A metal sample has a mass of 173.8 g and a volume of 10.0 cm$$^3. $$What is its density?

Accepted Answer

$$17.4 	ext{ g/cm}^3$$

Question 13

Which of the following is NOT a correct rule for counting significant figures?

Accepted Answer

All zeros are always significant.

Question 14

A student records a temperature as 22.11°C. How many significant figures are in this measurement?

Accepted Answer

4

Question 15

Which of the following is the correct scientific notation for 0.000000140 m?

Accepted Answer

$$1.40 	imes 10$$^{-7}$$ m

Question 16

If you are converting 14.5 m$$^3 to cm$^3$$, which of the following is the correct conversion factor to use?

Accepted Answer

$$(1 	ext{ m}^3 = 10^6$ 	ext{ cm}^3)$$

Question 17

A solution has a mass of 234 g and a volume of 210 mL. What is its density, rounded to the correct number of significant figures?

Accepted Answer

$$1.12 	ext{ g/mL}$$

Question 18

Which of the following statements about uncertainty in measurement is correct?

Accepted Answer

Error in a measurement is indicated by the number of significant figures.

Question 19

Which of the following is the correct way to express 0.000200500 in scientific notation with the correct number of significant figures?

Accepted Answer

$$2.00500 	imes 10$$^{-4}$$

Question 20

A student adds 3.75 mL and 4.1 mL. What is the correct answer, rounded according to the rules for significant figures?

Accepted Answer

7.9 mL

Measurement and Significant Figures in Chemistry

Study Guide - Practice Questions