Question 1

Which of the following best describes the kinetic-molecular theory as it applies to gases?

Accepted Answer

Particles in a gas are far apart and move freely with high energy.

Question 2

Which phase change is correctly matched with its description?

Accepted Answer

Melting: Solid to liquid

Question 3

A sample of water is heated from $10\ ^\circ\mathrm{C}$ to $110\ ^\circ\mathrm{C}$. Which phase changes will occur as the temperature increases?

Accepted Answer

Vaporization and melting

Question 4

Which of the following is a homogeneous mixture?

Accepted Answer

Saltwater

Question 5

Which statement about pure substances is correct?

Accepted Answer

They cannot be physically separated into simpler substances.

Question 6

Which property is NOT characteristic of metals?

Accepted Answer

Brittle and dull

Question 7

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

Accepted Answer

Iron rusting in air

Question 8

According to the law of conservation of mass, if 10 g of hydrogen reacts with 80 g of oxygen, what is the total mass of water produced?

Accepted Answer

$90\ \mathrm{g}$

Question 9

Which of the following best describes a nonmetal?

Accepted Answer

Low melting point, dull, poor conductor

Question 10

Which element is the most abundant in the human body?

Accepted Answer

Oxygen

Question 11

Which of the following is a correct chemical formula for a molecule containing 6 carbon, 6 hydrogen, 2 nitrogen, and 1 oxygen atom?

Accepted Answer

$\mathrm{C}_6\mathrm{H}_6\mathrm{N}_2\mathrm{O}$

Question 12

Which of the following is a physical property?

Accepted Answer

Melting point

Question 13

Which law states that compounds always contain the same elements in a constant proportion by mass?

Accepted Answer

Law of definite composition

Question 14

Which of the following is a semimetal (metalloid) property?

Accepted Answer

Exhibits properties of both metals and nonmetals

Question 15

Which of the following is a correct statement about the periodic table?

Accepted Answer

Nonmetals are found on the right side, metals on the left.

Question 16

Which of the following is an example of a heterogeneous mixture?

Accepted Answer

Sand and water

Question 17

Which of the following is a chemical property?

Accepted Answer

Ability to react with oxygen

Question 18

Which of the following phase changes requires energy to be added to the substance?

Accepted Answer

Melting

Question 19

Which of the following best describes the law of conservation of energy?

Accepted Answer

Energy cannot be created or destroyed, only converted from one form to another.

Question 20

Which of the following is the correct chemical symbol for gold?

Accepted Answer

Au

Matter and Energy: States, Classification, and Properties

Study Guide - Practice Questions