Unit 1

Question 1

One side of a cube measures 2.0 m. The volume of this cube is _______ m^3.

Answer 1

8.0

Question 2

How many significant figures are in the measurement 0.000221700?

Answer 2

Six

Question 3

What is the answer to the following problem using the correct number of significant figures? 1.00 x 7.000 x 2.0=

Answer 3

14

Question 4

What is the answer to the following problem using the correct number of significant figures? 1.50 + 3.010=

Answer 4

4.51

Question 5

How many sig figs are in the following measurement? 1.30 x 10^3

Answer 5

3

Question 6

The correct answer (reported to the proper number of significant figures) to the following is… 4.0 x 2.00 =

Answer 6

8.0

Question 7

What is the purpose of using significant figures in the science laboratory?

Answer 7

To determine the precision of measurement

Question 8

You have a 5.2 L sample of oil. How many milliliters is this?

Answer 8

5200 mL

Question 9

A patient must take 220 mg of pain medication every six hours. How many grams is that?

Answer 9

.22 g

Question 10

You have signed up for a 8-kilometer race; how many centimeters will you be running?

Answer 10

8 x 10^5

Question 11

3 kilogram = ______ milligrams

Answer 11

3 x 10^6

Question 12

If you do not understand a direction or part of a lab procedure, you should ….

Answer 12

ask the instructor before proceeding

Question 13

After completing an experiment, all chemical wastes should be …

Answer 13

disposed of according to your instructor’s directions.

Question 14

A substance that can be separated by filtration might be a(n)

Answer 14

Heterogeneous Mixture

Question 15

If matter is uniform throughout and cannot be separated into other substances by physical processes, but can be decomposed into other substances by chemical processes, it is called a(n) …

Answer 15

Compound

Question 16

The teacher performs an experiment before the class. The student observes the following: gas given off, odor, gives off heat, change of color. What type of change has likely taken place?

Answer 16

A chemical change

Question 17

Which phase change is occurring when solid carbon dioxide turns into a gas?

Answer 17

sublimation

Question 18

If molecules go from flowing around one another to a state where they are much closer and vibrating about a fixed point, which phase change has occurred?

Answer 18

Freezing

Question 19

Solids have a _____ shape and are ______.

Answer 19

definite, not easily compressed

Question 20

You are given a large piece of wood. You cut the wood in half. What happens to the density?

Answer 20

The density does not change.

Question 21

The density of aluminum is 3.00 g/mL. The volume of a piece of aluminum is 2.00 mL. Find its mass.

Answer 21

6.00 g

Question 22

The density of a pure diamond is 4.0 g/mL. The mass of a diamond is 1.0 g. What is the volume?

Answer 22

.25 mL

Question 23

The mass of a 10.0 mL sample of kerosene is 5.00g. The density of the kerosene is:

Answer 23

.500 g/mL

Question 24

What is the density of distilled water?

Answer 24

1.0 g/mL

Question 25

Look at the diagram attached. Which board shows precision but not accuracy?

Answer 25

Bottom left

Question 26

True or False: Salt water, & salad can ONLY be separated by a chemical reaction.

Answer 26

False

Question 27

True or False: Sodium chloride can ONLY be separated by a chemical reaction.

Answer 27

True.

Question 28

True or False: Sodium, Salad and Sodium Chloride are classified as a homogeneous mixture.

Answer 28

False

Question 29

True or False: Salt water is classified as a homogeneous mixture.

Answer 29

True

Question 30

True or False: Sodium, salad, & salt water are classified as compounds.

Answer 30

False

Question 31

True or False: Sodium Chloride is classified as a compound.

Answer 31

True

Question 32

Is reactivity a chemical or physical property?

Answer 32

Chemical

Question 33

Three physical properties of water are:

Answer 33

It has a boiling point of 100 degree Celsius. It is a colorless liquid. Sugar dissolves in it.

Question 34

Is corrosion of metal a physical or chemical change?

Answer 34

Chemical

Question 35

Is density an intensive or extensive physical property?

Answer 35

Intensive

Question 36

Is mass an intensive or extensive physical property?

Answer 36

Extensive

Question 37

When a metal rusts, is it a chemical or physical change?

Answer 37

Chemical

Question 38

What kind of volume and shape does oil have at room temperature?

Answer 38

Definite volume, Indefinite shape

Question 39

What kind of volume and shape does nitrogen take at room temperature?

Answer 39

Indefinite volume and indefinite shape

Question 40

True or False: Water at 175 degrees Celsius is more easily compressed than water at 25 degrees Celsius or -10 degrees Celsius.

Answer 40

True

Question 41

True or False: Two samples of a pure substance may have different densities

Answer 41

False

Question 42

True or false: density is a chemical property

Answer 42

False

Question 43

True or false: the density of a sample depends on its location on earth

Answer 43

false

Question 44

True or false: density is a physical property

Answer 44

true

Question 45

Look at the diagram attached. At which point will this compound be a liquid?

Answer 45

G

Question 46

Look at the diagram attached. After the compound undergoes a decrease in pressure from point G to F; which phase change does it experience?

Answer 46

Evaporation

Question 47

At point A, the compound is a \_\_\_\_\_\_\_\_. At point G, the compound is a \_\_\_\_\_\_\_\_.

Answer 47

Solid; Liquid. (When the compound is below the line it is a gas.)