Problem 2

What are the common physical states of

matter, and how do they differ from one

another?

Eric F.

Numerade Educator

Problem 8

Define density, and explain why it is considered a physical property rather than a

chemical property of matter.

Eric F.

Numerade Educator

Problem 9

Write a brief paragraph that

shows that you understand the

following terms and the relationships between them: atom, molecule,

compound, and element.

Check back soon!

Problem 11

Your friend mentions that she eats only

natural foods because she wants her food

to be free of chemicals. What is wrong with

this reasoning?

Check back soon!

Problem 12

Determine whether each of the following

substances would be a gas, a liquid, or a

solid if found in your classroom.

a. neon

b. mercury

c. sodium bicarbonate (baking soda)

d. carbon dioxide

e. rubbing alcohol

Eric F.

Numerade Educator

Problem 14

Classify each of the following as a physical

change or a chemical change, and describe

the evidence that suggests a change is taking

place.

a. cracking an egg

b. using bleach to remove a stain from a shirt

c. burning a candle

d. melting butter in the sun

Eric F.

Numerade Educator

Problem 15

Name the five most common SI base units

used in chemistry. What quantity is each unit

used to express?

Brian H.

Numerade Educator

Problem 16

What derived unit is appropriate for

expressing each of the following?

a. rate of water flow

b. speed

c. volume of a room

Eric F.

Numerade Educator

Problem 17

Compare the physical and chemical properties of salt and sugar. What properties do

they share? Which properties could you use

to distinguish between salt and sugar?

Jan E.

Numerade Educator

Problem 18

What do you need to know to determine the

density of a sample of matter?

Eric F.

Numerade Educator

Problem 19

Substances A and B are colorless, odorless

liquids that are nonconductors and flammable. The density of substance A is

0.97 g/mL; the density of substance B is

0.89 g/mL. Are A and B the same substance?

Explain your answer.

Kate D.

Numerade Educator

Problem 20

Is a compound a pure substance or a mixture? Explain your answer.

Eric F.

Numerade Educator

Problem 21

Determine if each material represented

below is an element, compound, or mixture,

and whether the model illustrates a solid,

liquid, or gas.

Check back soon!

Problem 22

Which quantity of each pair is larger?

a. 2400 cm or 2 m

b. 3 L or 3 mL

Eric F.

Numerade Educator

Problem 23

Using Appendix A, convert the following

measurements to the units specified.

$$\begin{array}{ll}{\text { a. } 357 \mathrm{mL}=? \mathrm{L}} & {\text { d. } 2.46 \mathrm{L}=? \mathrm{cm}^{3}} \\ {\text { b. } 25 \mathrm{kg}=? \mathrm{mg}} & {\text { e. } 250 \mu \mathrm{g}=? \mathrm{g}} \\ {\text { c. } 35000 \mathrm{cm}^{3}=? \mathrm{L}} & {\text { f. } 250 \mu \mathrm{g}=? \mathrm{kg}}\end{array}$$

Check back soon!

Problem 24

Use particle models to explain why liquids

and gases take the shape of their containers.

Eric F.

Numerade Educator

Problem 25

You are given a sample of colorless liquid in

a beaker. What type of information could you

gather to determine if the liquid is water?

Check back soon!

Problem 26

Calculate the density of a piece of metal if

its mass is 201.0 $\mathrm{g}$ and its volume is 18.9 $\mathrm{cm}^{3} .$

Eric F.

Numerade Educator

Problem 27

The density of $\mathrm{CCl}_{4}$ (carbon tetrachloride)

is 1.58 $\mathrm{g} / \mathrm{mL} .$ What is the mass of 95.7 $\mathrm{mL}$ of

$\mathrm{CCl}_{4} ?$

Check back soon!

Problem 28

What is the volume of 227 g of olive oil if

its density is 0.92 g/mL?

Eric F.

Numerade Educator

Problem 29

A white, crystalline material that looks like

table salt releases gas when heated under

certain conditions. There is no change in the

appearance of the solid, but the reactivity of

the material changes.

a. Did a chemical or physical change occur?

How do you know?

b. Was the original material an element or a

compound? Explain your answer.

Check back soon!

Problem 30

A student leaves an uncapped watercolor

marker on an open notebook. Later, the student discovers the leaking marker has produced a rainbow of colors on the top page.

a. Is this an example of a physical change or

a chemical change? Explain your answer.

b. Should the ink be classified as an element, a compound, or a mixture? Explain

your answer.

Eric F.

Numerade Educator

Problem 31

Your teacher will provide you with a sample

of a metallic element. Determine its density.

Check references that list the density of metals to identify the sample that you analyzed.

Check back soon!

Problem 32

Make a poster showing the types of product

warning labels that are found on products in

your home.

Check back soon!

Problem 33

Use the following terms to create a concept

map: volume, density, matter, physical property, and mass.

Check back soon!

Problem 34

What does the straight line on the graph

indicate about the relationship between

volume and mass?

Eric F.

Numerade Educator

Problem 36

What is the density of metal $\mathrm{A}$ ? of metal $\mathrm{B} ?$

Eric F.

Numerade Educator

Problem 37

Based on the density values in Table $4,$ what

do you think is the identity of metal A? of

metal B? Explain your reasoning.

Check back soon!

Problem 38

Graphing Tabular Data

The graphing calculator can run a program

that graphs ordered pairs of data, such as

temperature versus time. In this problem,

you will answer questions based on a graph

of temperature versus time that the calculator will create.

Go to Appendix C. If you are using a TI-83

Plus, you can download the program and

data sets and run the application as directed.

Press the APPS key on your calculator, and

then choose the application CHEMAPPS.

Press 1, then highlight ALL on the screen,

press 1, then highlight LOAD, and press 2 to

load the data into your calculator. Quit the

application, and then run the program

GRAPH. A set of data points representing

degrees Celsius versus time in minutes will

be graphed.

If you are using another calculator, your

teacher will provide you with keystrokes

and data sets to use.

a. Approximately what would the temperature be at the 16-minute interval?

b. Between which two intervals did the temperature increase the most: between 3

and 5 minutes, between 5 and 8 minutes,

or between 8 and 10 minutes?

c. If the graph extended to 20 minutes, what

would you expect the temperature to be?

Check back soon!