Chemistry Chapter test 2

Question 1

a mixture can be classified as a solution, suspension, or colloid based on the

Answer 1

size of its particles

Question 2

what method can be used to separate parts of a liquid mixture when the entire mixture can pass through a filter

Answer 2

distillation

Question 3

when a physical change in a sample occurs which of the following does NOT change

Answer 3

composition

Question 4

which of the following is a chemical change

Answer 4

water breaking into hydrogen & oxygen

Question 5

the units used to measure density are

Answer 5

grams/millilter

Question 6

a unit of mass is the

Answer 6

gram

Question 7

which of the following are pure substances

Answer 7

compounds

Question 8

which of the following is NOT a pure substance

Answer 8

milk

Question 9

volume is NOT measured in

Answer 9

grams

Question 10

a substance that is made up of only one kind of atom is a(n)

Answer 10

element

Question 11

what is the symbol for aluminum

Answer 11

Al

Question 12

what is the symbol for gold

Answer 12

Au

Question 13

the mathematical formula for density is

Answer 13

D= v/m

Question 14

if the density of gold is 19.3 g/mL, then 2mL has a mass of

Answer 14

38.6g

Question 15

objects sink in water because they

Answer 15

are more dense than water

Question 16

if a material contains three elements joined in a fixed proportion, it is a(n)

Answer 16

solution

Question 17

the density of water is

Answer 17

1 g/mL

Question 18

volume is

Answer 18

the amount of space an object takes up

Question 19

object X has a mass of 1 g and a volume of 1 mL. object Y is the same substances as X, but has a mass of 5 g. which object has a greater density

Answer 19

X and Y have the same density

Question 20

the density of an object with a mass of 25 g and a volume of 5 mL is

Answer 20

5 g/mL

Question 21

which of the following has the highest viscosity

Answer 21

corn syrup

Question 22

among the following, the unit that is least closely related is the

Answer 22

milliliter

Question 23

which of the following is NOT a clue that a chemical change has occured

Answer 23

change in shape

Question 24

ice floats because it is ___dense than water

Answer 24

less

Question 25

in order to make an object more dense without changing its mass, a person would___the volume

Answer 25

decrease

Question 26

in order to make an object more dense without changing it volume, a person would___the mass

Answer 26

increase

Question 27

if a beaker has a mass of 40 g, and the same beaker with red rock in it has a mass of 70 g. the mass of the red rock would be

Answer 27

30 g

Question 28

a graduated cylinder has 13 mL and a sphere is placed in the water. the new level is 39 mL. the volume of the sphere is

Answer 28

26 mL

Question 29

a material that is malleable and conducts electricity is most likely

Answer 29

a metal

Question 30

which of the following is a physical change

Answer 30

sawing a piece of wood in half

Question 31

flammability is a material’s ability to burn in the presence of

Answer 31

oxygen

Question 32

air is an example of a(n)

Answer 32

mixture

Question 33

the smallest piece of an element with all the properties of the element is a(n)

Answer 33

atom

Question 34

the smallest piece of a compound with all the properties of the compound is a(n)

Answer 34

molecule

Question 35

which of the following is an example of a pure substance

Answer 35

water

Question 36

the smallest piece of gold is a(n)

Answer 36

atom

Question 37

the smallest piece of water is a(n)

Answer 37

molecule

Question 38

a mixture that appears to contain only one substance is a(n)

Answer 38

homogeneous mixture