$$1 \text{ m} = 100 \text{ cm}$$

$$1 \text{ kg} = 1000 \text{ g}$$

Question 1

Which of the following statements about the International System of Units (SI) is correct?

Accepted Answer

The SI system is an official system of measurement used worldwide for length, mass, temperature, and time.

Question 2

A nurse needs to convert 2.5 L of saline solution to milliliters (mL) for a patient. What is the correct volume in mL?

Accepted Answer

$$2.5 	imes 10^3$ mL

Question 3

Which of the following is an example of an exact number?

Accepted Answer

There are 12 eggs in a dozen

Question 4

A student measures the length of a pencil as 14.35 cm. How many significant figures are in this measurement?

Accepted Answer

4

Question 5

Which of the following numbers has three significant figures?

Accepted Answer

0.0300

Question 6

A patient’s temperature is measured as 39.0 $$^\circC. $$What is this temperature in Kelvin (K)? (Use $$K = ^\circ C + 273.15)$$

Accepted Answer

$$312.15 K$$

Question 7

Which of the following is the correct relationship between units of length?

Accepted Answer

$$1 	ext{ m} = 100 	ext{ cm}$$

Question 8

A laboratory balance shows a mass of 0.04560 g. How many significant figures does this measurement have?

Accepted Answer

5

Question 9

When multiplying $$2.50 (3 $$sig figs) by $$0.040 (2 $$sig figs), how many significant figures should the answer have?

Accepted Answer

2

Question 10

A student adds $$12.11 g$$, $$0.034 g$$, and $$1.2 g. $$What is the sum, rounded to the correct number of decimal places?

Accepted Answer

$$13.3 g$$

Question 11

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

Accepted Answer

Leading zeros are significant.

Question 12

A sample of metal has a mass of 45.0 g and a volume of 15.0 mL. What is its density?

Accepted Answer

$$3.00 g/mL$$

Question 13

Which of the following conversions is correct?

Accepted Answer

$$1 	ext{ kg} = 1000 	ext{ g}$$

Question 14

A beaker contains 946 mL of water. How many quarts (qt) is this? (Use $$1 	ext{ qt} = 946 	ext{ mL})$$

Accepted Answer

$$1.00 qt$$

Question 15

A student records a measurement as 0.0700 m. How many significant figures are in this value?

Accepted Answer

3

Question 16

Which of the following is a measured number?

Accepted Answer

The length of a table measured with a ruler

Question 17

A patient’s mass is measured as 65.0 kg. What is this mass in pounds? (Use $$1 	ext{ kg} = 2.20 	ext{ lb})$$

Accepted Answer

$$143 lb$$

Question 18

When rounding the number 3.786 to two significant figures, what is the correct result?

Accepted Answer

3.8

Question 19

A solution has a density of $$1.25 g/mL. $$What is the mass of $$80.0 mL of $$this solution?

Accepted Answer

$$100 g$$

Question 20

Which of the following best describes the process for reporting the length of an object using a ruler?

Accepted Answer

Estimate the last digit by visually dividing the space between the smallest marked lines into 10 equal parts.

Matter and Measurement: Units, Significant Figures, and Calculations

Guida di studio - Domande di pratica