Unit 2

Question 1

Glass Breaking

Answer 1

Physical

Question 2

Reacts with water

Answer 2

Chemical

Question 3

Dissovles in Acotne

Answer 3

Physical

Question 4

is blue

Answer 4

Physical

Question 5

does not react with hydrogen

Answer 5

Chemical

Question 6

They show how many atoms of each element are in a unit of a substance

Answer 6

Chemical Formula

Question 7

physical property/chemical property

Answer 7

A physical property can be observed without changing the identity of the matter. A chemical property can be observed only when a chemical change might occur that would change the matter into something new.

Question 8

Which properties of a substance is affected by physical changes?

Answer 8

Shape,Size,Color,Position

Question 9

When elements form compounds, the elements

Answer 9

react to form a new substance with new properties.

Question 10

What is the mass of a bar of gold that measures 15cm×8cm×4cm and has a density of 19.32 g/cm3?

Answer 10

24.84 g

Question 11

which of the following statements about density is TRUE?

Answer 11

Density is a chemical property.

Question 12

What can describe an element

Answer 12

They have unique sets of properties.
All the particles are alike
They can join together to form compounds.

Question 13

What is the density of a substance that has a mass of 5 g and a volume of 40 cm3?

Answer 13

0.125g/cm3

Question 14

A lead ball has a mass of 454 g. The density of lead is 11.35 g/cm . What is the ball’s volume?

Answer 14

40 cm3

Question 15

What is some physical properties of matter

Answer 15

ductility,thermal conductivity,color

Question 16

Being able to burn wood is an example of wood’s

Answer 16

Chemical Property

Question 17

Two substances that undergo a chemical change together are ____ with one another

Answer 17

reactive

Question 18

Dissolving salt in water demonstrates

Answer 18

solubility,Physical Change

Question 19

How is a mixture different from a compound?

Answer 19

Each substance in a mixture keeps most of its characteristic properties.

Question 20

Which of the following results in a mixture?

Answer 20

dissolving salt

Question 21

The mass of a 20 L sample of gas with a density of 0.04 mg/L is

Answer 21

0.8 mg.

Question 22

Color, odor, mass, and volume are ____ of an object.

Answer 22

physical properties

Question 23

You have 20 mL of liquid mercury. Liquid mercury has a density of 13.55 g/cm . What is the mass of the
mercury sample?

Answer 23

271g

Question 24

You accidentally break your pencil in half. This is an example of

Answer 24

a physical change.

Question 25

The melting of butter when it is left out in a warm room is an example of

Answer 25

a physical change.

Question 26

A pure substance made of two or more elements that are chemically combined is called a

Answer 26

compound

Question 27

A pure substance must be either a(n) ____________________ or a(n) ____________________.

Answer 27

element,compound

Question 28

_____is the ability to transfer thermal energy from one area to another and is a physical property of matter.

Answer 28

thermal conductivity

Question 29

Some objects float on fluids because of ____________________, the mass per unit volume of an object.

Answer 29

density

Question 30

____________________ is the ability to burn.

Answer 30

Flammability

Question 31

Cheese melting on a hamburger is an example of a ____________________ change.

Answer 31

Physical

Question 32

Whether helium is in a large airship or in a small balloon floating right beside it, helium’s ____________________ will be the same.

Answer 32

density

Question 33

When mixtures are not completely mixed they are ___________

Answer 33

heterorgenues

Question 34

When mixtures mix well they are considered __________

Answer 34

miscible

Question 35

The ability of a substance to be pounded into thin sheets is ____________________.

Answer 35

malleability

Question 36

The ability of a substance to dissolve in another substance is ____________________.

Answer 36

solubility