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23-24 Unit 1 Chem Review

Total questions: 98

Worksheet time: 1hrs 11mins

Name
Class
Date
1.
How does heat flow?
a)
Always from cold to warm
b)
Always from warm to cold
c)
Both warm to cold & cold to warm
d)
It depends on the temperature
2.

Match symbol with the name of the following

a)

heat

1.

q

b)

mass

2.

m

c)

specific heat capacity

3.

cp

d)

temperature after the heat transfer

4.

Tf

e)

temperature before the heat transfer

5.

Ti

3.

Match the unit with the name, symbol of the following 

a)

J

1.

heat, q

b)

g

2.

mass, m

c)

Jg⋅ºC\frac{J}{g\cdotºC}  

3.

specific heat, cp

d)

ºC

4.

∆T

4.

Which would take the MOST amount of heat to warm from room temperature to 80ºC?

a)

25 g of water

 

b)

75 g of water

 

5.
Chemical reactions that absorb energy are called
a)
endothermic
b)
fast
c)
slow
d)
exothermic
6.
Formula for solving specific heat problems
a)
q = mcΔT
b)
H = ΔH x moles
c)
H = ΔH x grams
d)
products - reactants
7.
H2 + 2 C + N2 + 270.3 kJ --> 2 HCN
Is this reaction endothermic or exothermic?
a)
Endothermic 
b)
Exothermic
8.
H2 + Cl2 --> 2 HCl + 1845 kJ
Is this reaction endothermic or exothermic?
a)
Endothermic 
b)
Exothermic
9.
If a piece of aluminum is heated from 30.0oC to 50.0oC, what is the value of ΔT?
a)
293o C
b)
20o C
c)
0o C
d)
80o C
10.
A pure substance...
a)
is an element or a compound
b)
is an element or a mixture
c)
is a compound or a mixture
d)
is a mixture
11.
A mixture that appears to be evenly mixed throughout:
a)
an atom
b)
a compound
c)
a homogeneous mixture
d)
a heterogeneous mixture
12.
1 A substance made up of two or more chemically combinedelements is —
a)
an element
b)
mixture
c)
compound
d)
solution
13.
 A substance that cannot be broken down into any other substance by ordinarychemical means is called —
a)
molecule
b)
mixture
c)
element
d)
compound
14.
Two or more physically combined substances form —
a)
a compoud
b)
an acid
c)
an element
d)
a mixture
15.
NaHCO3 is an example of —
a)
an abbreviation
b)
a compound
c)
a mixture
d)
an element
16.
What is an example of a mixture?
a)
Table salt
b)
Salt water
c)
Oxygen
d)
Air
17.
A substance made of only one type of atom is called —
a)
an element
b)
a mixture
c)
a compound
d)
a salt
18.
Which of the following is a way in which elements and compounds are similar?
a)
Elements and compounds are pure substances.
b)
Elements and compounds are both made up of different kinds of atoms.
c)
Elements and compounds can both be broken down by physical means.
d)
Elements and compounds are listed on the periodic table.
19.
What is an example of an element?
a)
Oxygen
b)
Pure water
c)
Air
d)
Table salt
20.
Two or more substances in the same place but NOT chemically combined or in a specific ratio is called —
a)
a compound 
b)
a pure substance
c)
an element
d)
a mixture
21.

Select all of the elements in these answer choices.

a)

O2

b)

CO2

c)

Co

d)

CO

e)

C60

22.

Select all of the compounds in these answer choices.

a)

H2S

b)

C6H12O6

c)

O2

d)

CO

e)

Co

23.

Select all of the compounds in these particle diagrams.

a)
b)
c)
d)
e)
24.
Question Image

Match the following

a)
1.

element

b)
2.

compound

c)
3.

mixture of 2 elements

d)
4.

mixture of 2 compounds

25.

Match the following

a)

Co

1.

element

b)

CO

2.

compound

c)

CH4 & O2

3.

mixture

26.

Match the term with its definition

a)

a pure substance that consists of one type of atom.

1.

elment

b)

a pure substance that consists of multiple types of atoms chemically joined.

2.

compound

c)

contains two or more different substances physically joined together

3.

mixture

27.
a)
Element
b)
Compound
c)
Mixture
28.
a)
Element
b)
Compound
c)
Mixture
29.
a)
Element
b)
Compound
c)
Mixture
30.
a)
Element
b)
Compound
c)
Mixture
31.
a)
Element
b)
Compound
c)
Mixture
32.
a)
Element
b)
Compound
c)
Mixture
33.
This diagram represents a _____.
a)
pure substance that is a compound
b)
mixture of elements
c)
pure substance that is an element
d)
mixture of compounds
34.

A student placed a small chip of limestone into a hydrochloric acid solution, and carbon dioxide gas was released. The carbon dioxide provided evidence that

a)

only a physical change occurred.

b)

a chemical change occurred.

c)

only a loss of mass occurred.

d)

the formation of an element occurred.

35.

What type of change is this?

a)

Chemical

b)

Melting

c)

Evaporation

d)

Condensation

e)

Sublimation

36.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture of elements
d)
mixture of compounds
37.
Classify the picture with the correct label.
a)
Element
b)
Compound
c)
Mixture of Elements
d)
Mixture of Compounds
38.
A pure substance that cannot be broken down into other substances by chemical or physical means. 
a)
compound          
b)
atom
c)
mixture 
d)
element
39.

A mixture that does NOT appear to be evenly mixed throughout is ______.

a)

an atom

b)

a compound

c)

a homogeneous mixture

d)

a heterogeneous mixture

40.
Two classifications of a pure substance are
a)
homogeneous and heterogeneous
b)
atoms and elements
c)
elements and compounds
d)
solutions and colloids
41.

Select the measurement with the correct number of significant figures.

a)

8.250

b)

8.25

c)

8.2

d)

8

42.

How many significant figures are in the following measurement?

2.51 m

a)

1 significant figure

b)

2 significant figures

c)

3 significant figures

d)

4 significant figures

e)

5 significant figures

43.

How many significant figures are in the following measurement?

1052.8 km

a)

5 significant figures

b)

3 significant figures

c)

10 significant figures

d)

2 significant figures

e)

4 significant figures

44.
Round 0.010229 to four sig figs
a)
1022
b)
1023
c)
0.01023
d)
0.01022
45.
Round 1009 to three sig figs
a)
100
b)
101
c)
1010
d)
1000
46.

Which of these is a valid measurement for the graduated cylinder?

a)

6.5

b)

6.60

c)

6

d)

6.65

47.

Which of these is a valid measurement for the length of the object?

a)

3.2 cm

b)

3.12 cm

c)

3 cm

d)

3.219 cm

48.
What is the volume of liquid in this graduated cylinder?
a)
43.0 mL
b)
43 mL
c)
43.05 mL
d)
44.5 mL
49.

The measurement 10 101 ml has (a)   significant figures

50.

To what position would you record your measurement?

a)

ones

b)

tens

c)

tenths

d)

hundredths

51.

If you need the volume of a glass of water, what unit would you measure in?

a)

liters

b)

meters

c)

grams

d)

seconds

52.

What SI Unit is used for Mass

a)

Pound

b)

Ounce

c)

Meter

d)

Gram

53.

Freezing point - the temperature at which a substance changes from a liquid to a solid

a)

chemical property

b)

intensive physical property

c)

extensive physical property

54.

Flammability - how easily something combusts

a)

chemical property

b)

intensive physical property

c)

extensive physical property

55.

Toxicity - how poisonous something is

a)

chemical property

b)

intensive physical property

c)

extensive physical property

56.

Density - the ratio of mass to volume of a substance

a)

chemical property

b)

intensive physical property

c)

extensive physical property

57.

Freezing point - the temperature at which a substance changes from a liquid to a solid

a)

chemical property

b)

intensive physical property

c)

extensive physical property

58.

Flammability - how easily something combusts

a)

chemical property

b)

intensive physical property

c)

extensive physical property

59.

Toxicity - how poisonous something is

a)

chemical property

b)

intensive physical property

c)

extensive physical property

60.

Density - the ratio of mass to volume of a substance

a)

chemical property

b)

intensive physical property

c)

extensive physical property

61.

Weight - the force an object exerts due to gravity

a)

chemical property

b)

intensive physical property

c)

extensive physical property

62.

Mass - how much matter an object contains

a)

chemical property

b)

intensive physical property

c)

extensive physical property

63.

Boiling point - the temperature at which a substance changes from a liquid to a gas

a)

chemical property

b)

intensive physical property

c)

extensive physical property

64.

Melting point - the temperature at which a substance changes from a solid to a liquid

a)

chemical property

b)

intensive physical property

c)

extensive physical property

65.

Volume - the amount of space a substance takes up

a)

chemical property

b)

intensive physical property

c)

extensive physical property

66.

Reactivity - the ability of a substance to cause a chemical reaction

a)

chemical property

b)

intensive physical property

c)

extensive physical property

67.

Hardness - the ability to resist being dented or scratched

a)

chemical property

b)

intensive physical property

c)

extensive physical property

68.

Conductivity - the ability to transfer heat or electricity through something

a)

chemical property

b)

intensive physical property

c)

extensive physical property

69.

Malleability - the ability to be bent and forged

a)

chemical property

b)

intensive physical property

c)

extensive physical property

70.

Ductility - the ability to be drawn out into a wire without breaking

a)

chemical property

b)

intensive physical property

c)

extensive physical property

71.

Ability to rust - the ability to form metal oxides (rust)

a)

chemical property

b)

intensive physical property

c)

extensive physical property

72.

Corrosiveness - the ability to eat away at or damage living tissue

a)

chemical property

b)

intensive physical property

c)

extensive physical property

73.

Which set of properties, intensive or extensive, are based on the size of a sample?

a)

intensive

b)

extensive

74.

What kind of physical property is this? Color

a)

intensive

b)

extensive

75.

What kind of physical property is this? Temperature

a)

intensive

b)

extensive

76.

What kind of physical property is this? Energy

a)

intensive

b)

extensive

77.

What kind of physical property is this? Number of Atoms

a)

intensive

b)

extensive

78.

What kind of physical property is this? Hardness

a)

intensive

b)

extensive

79.

What kind of physical property is this? Density

a)

intensive

b)

extensive

80.

What kind of physical property is this? Odor

a)

intensive

b)

extensive

81.

What kind of physical property is this? Specific Heat

a)

intensive

b)

extensive

82.

What kind of physical property is this? Boiling Point

a)

intensive

b)

extensive

83.

What kind of physical property is this? Volume

a)

intensive

b)

extensive

84.

What kind of physical property is this? Mass

a)

intensive

b)

extensive

85.

What kind of physical property is this? Melting Point

a)

intensive

b)

extensive

86.

What kind of physical property is this? State of Matter

a)

intensive

b)

extensive

87.

What kind of physical property is this? Length

a)

intensive

b)

extensive

88.

TRUE or FALSE: "Matter cannot be lost even when a chemical reaction occurs."

a)

TRUE

b)

FALSE

89.

A new substance is formed during which type of change?

a)

Physical Change

b)

Chemical Change

90.

Properties that can only be observed or measured by changing the chemical identity of a substance.

a)

Physical Properties

b)

Combustible Properties

c)

Chemical Properties

d)

Changeable Properties

91.

Which of the following is a Chemical Property?

a)

solubility

b)

flammability

c)

viscosity

d)

melting point

92.

Release of light, temperature change, sudden color change, sudden appearance of a solid, and gas given off are all evidence of what?

a)

chemical change

b)

physical change

c)

matter disappearing

d)

physical and chemical changes occurring

93.

Process by which the atoms of one or more substances are rearranged to form different substances.

a)

physical reaction

b)

solubility

c)

chemical reaction

d)

oxidation

94.

Cutting, crushing, melting, and boiling are all examples of what?

a)

physical changes

b)

chemical changes

c)

messes

d)

Law of Conservation of Particles

95.

A change in a substance that only affects its physical properties.

a)

physical change

b)

chemical change

c)

oxidation change

d)

matter change

96.

This change is a

a)

chemical reaction

b)

physical change

c)

musical change

d)

Ice Ice baby

97.

How is a chemical change different from a physical change?

a)

there is no difference

b)

a physical change creates a new substance

c)

a chemical change creates a new substance

98.
Salt dissolves in water
a)
physical Change
b)
chemical change

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