Question 1

Which of the following best describes an intensive property?

Accepted Answer

A property that is independent of the amount of substance present, such as density.

Question 2

A sample of seawater is analyzed and found to have the same composition throughout. Which classification best describes this sample?

Accepted Answer

Homogeneous mixture (solution)

Question 3

Which of the following is a chemical property?

Accepted Answer

Flammability

Question 4

Which of the following changes is a chemical change?

Accepted Answer

Burning of gasoline in an engine

Question 5

A student measures the mass of a metal sample as 12.34 g and its volume as 4.1 mL. What is the density of the metal, reported with the correct number of significant figures?

Accepted Answer

$$D = \frac{12.34\ \mathrm{g}}{4.1\ \mathrm{mL}} = 3.0\ \mathrm{g/mL}$$

Question 6

Which of the following statements about the Law of Constant Composition is correct?

Accepted Answer

A compound always contains the same relative number of atoms of each element.

Question 7

Which separation technique would be most effective for separating a mixture of sand and salt water?

Accepted Answer

Filtration

Question 8

Convert 25.0 °C to Kelvin.

Accepted Answer

$$K = 25.0 + 273.15 = 298.15\ \mathrm{K}$$

Question 9

Which of the following is an example of an extensive property?

Accepted Answer

Mass

Question 10

A student records the following measurements for the mass of a sample: 2.51 g, 2.50 g, 2.52 g, and 2.51 g. The true mass is 2.80 g. Which statement best describes the measurements?

Accepted Answer

The measurements are precise but not accurate.

Question 11

How many significant figures are in the number 0.004560?

Accepted Answer

4

Question 12

Which of the following is NOT a base SI unit?

Accepted Answer

Liter

Question 13

A solution is prepared by dissolving 5.00 g of NaCl in 100.0 g of water. Which term best describes the resulting mixture?

Accepted Answer

Homogeneous mixture

Question 14

Which of the following is the correct equation for converting Celsius to Fahrenheit?

Accepted Answer

$$^\circ F = \frac{9}{5}(^\circ C) + 32$$

Question 15

Which of the following best describes a compound?

Accepted Answer

A substance made of two or more different kinds of elements.

Question 16

A chemist needs to convert 2.50 inches to centimeters. Which conversion factor should be used?

Accepted Answer

$$\frac{2.54\ \mathrm{cm}}{1\ \mathrm{in}}$$

Question 17

Which of the following is an example of a physical change?

Accepted Answer

Melting of ice

Question 18

A student adds 2.345 g and 0.07 g. What is the correct answer with the proper number of significant figures?

Accepted Answer

2.42 g

Question 19

Which technique would best separate the components of black ink into its individual dyes?

Accepted Answer

Chromatography

Question 20

Which of the following is an exact number?

Accepted Answer

The number of students in a classroom

Introduction to Matter and Measurement: Foundational Concepts for Physical Science

Study Guide - Practice Questions

Study Guide - Flashcards