Conceptual Chemistry, 3e (Suchocki)
Chapter 2 Elemetns of Chemistry
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2.1 Matter Has Physical and Chemical Properties
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1)
1
Which of the following would be considered a physical property?
1
A)
1
density
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B)
1
flammability
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C)
1
corrosion resistance
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D)
1
reactivity towards acid
1
E)
1
oxygen sensitivity
1
Answer:
1
A
1
Diff: 1
1
1
2)
1
Which of the following would not be considered a physical property?
1
A)
1
temperature at which a material catches on fire
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B)
1
color
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C)
1
conductivity
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D)
1
hardness
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E)
1
temperature at which a material melts
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Answer:
1
A
1
Diff: 1
1
1
3)
1
Which of the following would be considered a chemical property?
1
A)
1
reactivity towards water
1
B)
1
melting temperature
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C)
1
boiling temperature
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D)
1
conductivity
1
E)
1
flexibility
1
Answer:
1
A
1
Diff: 1
1
1
4)
1
Which of the following would not be considered a chemical property?
1
A)
1
the temperature at which a liquid will boil
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B)
1
light sensitivity
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C)
1
whether a metal will rust or not
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D)
1
whether a material will dissolve in acid or not
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E)
1
the tendency of a material to explode
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Answer:
1
A
1
Diff: 1
1
1
5)
1
Which of the following is an example of a physical change?
1
A)
1
water boiling and being converted into steam
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B)
1
water being electrolyzed and being converted in hydrogen and oxygen
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C)
1
iron metal reacting with oxygen to form rust
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D)
1
a candy bar being digested by a student
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E)
1
charcoal being converted into ash
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Answer:
1
A
1
Diff: 1
1
1
6)
1
Which of the following is an example of a chemical change?
1
A)
1
gasoline being used in the engine of a car producing exhaust
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B)
1
water freezing into ice crystals
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C)
1
aftershave or perfume on your skin generating a smell
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D)
1
a piece of metal expanding when heated, but returning to original size when cooled
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E)
1
breaking a glass window
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Answer:
1
A
1
Diff: 1
1
1
7)
1
The following image describes what type of change?
1
A)
1
a chemical change
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B)
1
a physical change
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C)
1
a change in state
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D)
1
no change
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E)
1
an elemental change
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Answer:
1
A
1
Diff: 1
1
1
8)
1
The following image describes which type of change?
1
A)
1
a physical change
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B)
1
a chemical change
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C)
1
an elemental change
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D)
1
a change in reactivity
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E)
1
no change
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Answer:
1
A
1
Diff: 1
1
1
9)
1
The boiling point of methanol is 65°C and the boiling point of ethanol is 78°C. Which of the following statements is true?
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A)
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At 70°C you would have methanol gas and liquid ethanol.
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B)
1
At 90°C you would have methanol and ethanol as solids.
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C)
1
At 50°C you would have methanol and ethanol as gases.
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D)
1
At 40°C the methanol reacts with the ethanol.
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E)
1
none of the above
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Answer:
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A
1
Diff: 1
1
1
10)
1
Water and ethanol can be separated by heating the ethanol until it boils away from the water. What type of change is this?
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A)
1
a physical change
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B)
1
a chemical change
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C)
1
a molecular change
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D)
1
a decomposition
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E)
1
none of the above
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Answer:
1
A
1
Diff: 1
1
1
11)
1
Which of the following is not a chemical change?
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A)
1
a rock being crushed to powder
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B)
1
grass growing
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C)
1
grape juice turning into wine
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D)
1
a loaf of bread growing mold
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E)
1
wood burning to ash
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Answer:
1
A
1
Diff: 1
1
1
2.2 Atoms Are the Fundamental Components of Elements
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1)
1
Which of the following images could describe an element at the atomic level?
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A)
1
1
B)
1
1
C)
1
1
D)
1
none of the images
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E)
1
all of the images
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Answer:
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E
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Diff: 2
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1
2)
1
Which of the following statements best describes an element?
1
A)
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a material consisting of only one type of atom
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B)
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a material that is pure
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C)
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a material that has consistent physical properties
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D)
1
a material with more than one type of atom
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E)
1
a material that has consistent chemical properties
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Answer:
1
A
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Diff: 2
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1
3)
1
The element silicon has a melting point of 1,410°C and a boiling point of 2,355°C. It is a weak conductor of electricity, its density is 2.3 grams per cubic centimeter and it easily forms silicon dioxide when exposed to air. Which of the following is a chemical property of silicon?
1
A)
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its ability to conduct electricity
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B)
1
its density
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C)
1
its melting point
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D)
1
its ability to react with oxygen
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E)
1
C and D
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Answer:
1
D
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Diff: 2
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1
4)
1
Which of the following elements should exhibit some metallic properties and some nonmetallic properties?
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A)
1
Zn
1
B)
1
S
1
C)
1
Ga
1
D)
1
C
1
E)
1
Si
1
Answer:
1
E
1
Diff: 1
1
1
2.3 Elements Can Combine to Form Compounds
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1)
1
Which statement best describes a compound?
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A)
1
a material that is made up of a combination of atoms bonded together
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B)
1
a mixture of more than one element
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C)
1
a mixture of atoms
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D)
1
a material that is made up of a single type of atom
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E)
1
none of the above
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Answer:
1
A
1
Diff: 2
1
1
2)
1
What is the name of the following compound?
NaF
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A)
1
sodium fluoride
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B)
1
natural fosfate
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C)
1
natrium fluoride
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D)
1
nitrogen afleck
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E)
1
sodium phosphide
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Answer:
1
A
1
Diff: 3
1
1
3)
1
What is the name of the following compound?
CaCl2
1
A)
1
calcium chloride
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B)
1
carbon chloride
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C)
1
dichlorocalcium
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D)
1
calc two
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E)
1
dicalcium chloride
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Answer:
1
A
1
Diff: 3
1
1
4)
1
What is the name of the following compound?
CO2
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A)
1
carbon dioxide
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B)
1
dicobalt
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C)
1
dioxocarbon
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D)
1
calcium oxide
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E)
1
calcium dioxide
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Answer:
1
A
1
Diff: 3
1
1
5)
1
What is the name of the following compound?
SF3
1
A)
1
sulfur trifluoride
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B)
1
sulfur fluoride
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C)
1
trifluorosulphide
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D)
1
fluorine sulphide
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E)
1
none of the above
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Answer:
1
A
1
Diff: 3
1
1
6)
1
How many atoms are in one molecule of Na2SO4?
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A)
1
7
1
B)
1
2
1
C)
1
4
1
D)
1
3
1
E)
1
24
1
Answer:
1
A
1
Diff: 2
1
1
7)
1
How many atoms of Oxygen (O) are in H3OClO4
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A)
1
5
1
B)
1
2
1
C)
1
3
1
D)
1
7
1
E)
1
1
1
Answer:
1
A
1
Diff: 2
1
1
8)
1
How many different elements are in the compound C6H12O6?
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A)
1
3
1
B)
1
6
1
C)
1
24
1
D)
1
none of the above
1
E)
1
All of the elements are the same.
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Answer:
1
A
1
Diff: 2
1
1
9)
1
If you have two molecules of TiO2, how many oxygen atoms would you have?
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A)
1
4
1
B)
1
2
1
C)
1
3
1
D)
1
6
1
E)
1
none
1
Answer:
1
A
1
Diff: 3
1
1
10)
1
If you have one molecule of TiO2, how many molecules of O2 does it contain?
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A)
1
None, O2 is a different molecule than TiO2.
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B)
1
One, TiO2 is a mixture of Ti and O2.
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C)
1
Two, TiO2 is a mixture of Ti and 2 O.
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D)
1
Three, TiO2 contains three molecules.
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E)
1
none of the above
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Answer:
1
A
1
Diff: 3
1
1
2.4 Most Materials Are Mixtures
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1)
1
What is the difference between a compound and a mixture?
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A)
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A mixture can be physically separated into its components; a compound cannot be physically separated into its components.
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B)
1
A compound can be physically separated into its components; a mixture cannot be physically separated into its components.
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C)
1
A compound is just a mixture of elements.
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D)
1
The components of a mixture do not have the same properties individually as they do when mixed.
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E)
1
The components of a compound have the same properties individually as they do when mixed.
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Answer:
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A
1
Diff: 2
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1
2)
1
Which of the following is a mixture?
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A)
1
air
1
B)
1
gold
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C)
1
salt
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D)
1
iron
1
E)
1
helium
1
Answer:
1
A
1
Diff: 2
1
1
3)
1
The following image represents which kind of matter?
1
A)
1
a compound
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B)
1
a mixture
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C)
1
an element
1
D)
1
none of the above
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E)
1
all of the above
1
Answer:
1
A
1
Diff: 1
1
1
4)
1
The following image represents which kind of matter?
1
A)
1
a mixture
1
B)
1
a compound
1
C)
1
an element
1
D)
1
none of the above
1
E)
1
all of the above
1
Answer:
1
A
1
Diff: 1
1
1
5)
1
A combination of two or more substances in which they no longer retain their chemical properties is called a(n) ______.
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A)
1
mixture
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B)
1
compound
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C)
1
heterogeneous mixture
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D)
1
periodic trend
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E)
1
suspension
1
Answer:
1
B
1
Diff: 1
1
1
2.5 Chemists Classify Matter as Pure or Impure
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1)
1
Which of the following is a pure substance?
1
A)
1
baking soda
1
B)
1
salt water
1
C)
1
cooking oil
1
D)
1
duct tape
1
E)
1
orange juice
1
Answer:
1
A
1
Diff: 2
1
1
2)
1
Which of the following would be considered a heterogeneous mixture?
1
A)
1
salad dressing
1
B)
1
water
1
C)
1
milk
1
D)
1
vegetable oil
1
E)
1
vinegar
1
Answer:
1
A
1
Diff: 1
1
1
3)
1
How would you classify the following material?
swimming pool water
1
A)
1
homogenous mixture
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B)
1
heterogeneous mixture
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C)
1
a pure element
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D)
1
a pure compound
1
E)
1
depends on how many children have been in it
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Answer:
1
A
1
Diff: 1
1
1
4)
1
Which of the following would be considered a homogeneous mixture?
1
A)
1
wine
1
B)
1
hydrogen cyanide
1
C)
1
rusty iron
1
D)
1
pretzel
1
E)
1
sugar
1
Answer:
1
A
1
Diff: 1
1
1
5)
1
When blue food coloring is dissolved in water, the result is a ______.
1
A)
1
homogeneous mixture called a solution
1
B)
1
homogeneous mixture called a suspension
1
C)
1
heterogeneous mixture called a solution
1
D)
1
heterogeneous mixture called a suspension
1
E)
1
pure liquid
1
Answer:
1
A
1
Diff: 2
1
1
6)
1
If you filter sea water to remove all of the particles you would be left with a clear ______.
1
A)
1
homogenous mixture called a solution
1
B)
1
homogeneous mixture called a suspension
1
C)
1
heterogeneous mixture called a solution
1
D)
1
heterogeneous mixture called a suspension
1
E)
1
pure liquid
1
Answer:
1
A
1
Diff: 2
1
1
7)
1
How would you classify the following material?
milk
1
A)
1
a suspension
1
B)
1
a heterogeneous mixture
1
C)
1
a solution
1
D)
1
an element
1
E)
1
a compound
1
Answer:
1
A
1
Diff: 2
1
1
8)
1
How would you classify the following material?
coffee (black)
1
A)
1
a suspension
1
B)
1
a heterogeneous mixture
1
C)
1
a solution
1
D)
1
an element
1
E)
1
a compound
1
Answer:
1
C
1
Diff: 2
1
1
9)
1
How would you classify the following material?
coffee (with milk)
1
A)
1
a suspension
1
B)
1
a heterogeneous mixture
1
C)
1
a solution
1
D)
1
an element
1
E)
1
a compound
1
Answer:
1
A
1
Diff: 2
1
1
10)
1
How would you classify the following material?