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Chem I Spring Final Exam Review

Total questions: 142

Worksheet time: 3hrs 26mins

Name
Class
Date
1.

Which field of science studies the composition and structure of matter?

a)

physics

b)

biology

c)

chemistry

d)

geology

2.

A chemical change occurs when a piece of wood

a)

is split.

b)

is painted.

c)

decays.

d)

is cut

3.

How many significant figures are in the measurement 40,500 mg?

a)

two

b)

three

c)

four

d)

five

4.

What is the density of an object having a mass of 8.0 g and a volume of 25 ml?

a)

0.32

b)

2.0

c)

3.1

d)

200

5.

Of the elements Pt, V, Li, and Kr, which is a nonmetal?

a)

Pt

b)

V

c)

Li

d)

Kr

6.

What is the correct formula for potassium sufite?

a)

KHSO3

b)

K2S

c)

K2SO3

d)

K2SO4

7.

How many moles of tungsten atoms are made up of 4.8 x 1025 atoms?

a)

8.0 x 102 moles

b)

8.0 x 101 moles

c)

1.3 x 10-1 moles

d)

1.3 x 10-2 moles

8.

How many molecules are in 2.10 mol of carbon dioxide?

a)

2.53 x 10 24 molecules

b)

3.79 x 10 24 molecules

c)

3.49 x 10 -24 molecules

d)

1.26 x 10 24 molecules

9.

How many moles of calcium bromide, CaBr2, are in 5.0 grams of the substance?

a)

2.5 x 10-2 mol

b)

4.2 x10-2 mol

c)

4.0 x 10-2 mol

d)

1.0 x 10 3

10.

What is the percent composition of carbon in heptane, C7H16?

a)

7%

b)

16%

c)

68%

d)

84%

11.

Which of the following is the correct skeleton equation for the reaction that takes place when solid phosphorus combines with the oxygen gas to form diphosphorus pentoxide?

a)

P (s) + O2 (g) --> PO2 (g)

b)

P (s) + O (g) --> P5O2 (g)

c)

P (s) + O2 (g) --> P2O5 (g)

d)

P2O5 (g) --> P (s) + O2 (g)

12.

What are the coefficients that will balance the skeleton equation below?

__N2 + __H2 -> __NH3

a)

1, 1, 2

b)

1, 3, 3

c)

3, 1, 2

d)

1, 3, 2

13.

The products of a combustion reaction do NOT include...

a)

water

b)

carbon dioxide

c)

oxygen

d)

hydrogen

14.

If 1 egg and 1/3 cup of oil are needed for each bag of brownie mix, how many bags of brownie mix do you need if you want to use up all 3 eggs and 1 cup of oil?

a)

1

b)

2

c)

3

d)

4

15.

The equation below shows the decomposition of lead nitrate. How many grams of oxygen are produced when 11.5 grams NO2 is formed?

2 Pb(NO3)2 --> 2 PbO + 4 NO2 + O2

a)

1.00 g

b)

2.00 g

c)

2.88 g

d)

32.0 g

16.

What is the number of moles of solute in 250 mL of 0.4 M solution?

a)

0.1 mol

b)

0.16 mol

c)

0.62 mol

d)

1.6 mol

17.

How many mL of a 2.0 M NaBr solution are needed to make a 200.0 mL of 0.5 M NaBr?

a)

25 mL

b)

50 mL

c)

100 mL

d)

150 mL

18.

________ is the minimum amount of energy required to start a chemical reaction.

a)

Activation Energy

b)

Kinetic Energy

c)

Potential Energy

d)

Thermal Energy

19.

A ________ is a substance that speeds up the rate of a chemical reaction without being changed by the reaction.

a)

catalyst

b)

enzyme

c)

reactant

d)

inhibitor

20.

In a chemical reaction, the state in which the rate of the forward reaction equals the rate of the reverse reaction is called ________.

a)

Chemical Equilibrium

b)

Chemical Kinetics

c)

Chemical Reaction

d)

Chemical Bonding

21.

________ states that a chemical reaction occurs when atoms, ions, and molecules collide effectively.

a)

Collision Theory

b)

Kinetic Theory

c)

Quantum Theory

d)

Relativity Theory

22.

A collision that results in a reaction is known as ________.

a)

Effective Collision

b)

Ineffective Collision

c)

Elastic Collision

d)

Inelastic Collision

23.

A state of balance is referred to as ________.

a)

Equilibrium

b)

Imbalance

c)

Chaos

d)

Disorder

24.

The quantity of energy released or absorbed as heat during a chemical reaction is called ________.

a)

Heat of Reaction

b)

Enthalpy Change

c)

Activation Energy

d)

Entropy

25.

The study of rates and mechanisms of chemical reactions is known as ________.

a)

Kinetics

b)

Thermodynamics

c)

Electrochemistry

d)

Stoichiometry

26.

When everything on the left of the equation increases it is referred to as ________.

a)

Left Shift

b)

Right Shift

c)

Upward Shift

d)

Downward Shift

27.

When everything on the right of the equation increases it is referred to as ________.

a)

Right Shift

b)

Left Shift

c)

Upward Shift

d)

Downward Shift

28.

The series of steps that occur in a reaction is called ________.

a)

Mechanism

b)

Reaction Pathway

c)

Reaction Sequence

d)

Reaction Steps

29.

Equilibrium may exist in situations that do not involve chemical changes is known as ________.

a)

Physical Equilibrium

b)

Chemical Equilibrium

c)

Dynamic Equilibrium

d)

Static Equilibrium

30.

Shows how potential energy of the reactants and products changes over the course of a reaction

a)

Potential Energy Diagram

b)

Reaction Pathway

c)

Energy Profile

d)

Activation Energy Graph

31.

The speed at which the reaction occurs is defined as ________.

a)

Rate

b)

Velocity

c)

Acceleration

d)

Momentum

32.

A chemical reaction in which the products re-form the original reactants is called ________.

a)

Reversible Reaction

b)

Irreversible Reaction

c)

Endothermic Reaction

d)

Exothermic Reaction

33.

Such reactions which continue in both directions are called:

a)

Irreversible reactions

b)

Reversible reactions

c)

Non-reactive reactions

d)

dynamic reactions

34.

A complete reaction is in which:

a)

All the reactants convert into products

b)

All the reactants do not convert into products

c)

Half reactants convert into products

d)

only 10% reactants convert into products

35.
2SO2(g)+O2(g)⇌2SO3(g)
Removing O2(g) will
a)
shift equilibrium right
b)
shift equilibrium left
c)
decrease temperature
d)
have no change
36.
2SO2(g)+O2(g)⇌2SO3(g)
Adding SO2(g) will
a)
shift equilibrium right
b)
shift equilibrium left
c)
increase rate of reaction
d)
have no change
37.
What is the equilibrium-constant expression for 
CO2(g) + H2(g) ↔ CO(g) + H2O(l)
a)
Kc= [CO][H2O] / [CO2][H2]  
b)
Kc= [CO2][H2] / [CO]
c)
Kc= [CO2][H2] / [CO][H2O]
d)
Kc= [CO] / [CO2][H2]  
38.
For the reaction...
heat  +  N2  +  O2  ↔  2NO
If the heat is added to the chemical system, the equilibrium will shift _______.
a)
left
b)
right
c)
left and right
d)
neither left nor right
39.

Which of the following choices gives the correct coefficients of the chemical equation, _Al + _O2 → _ Al2O3 respectively?

a)

2,2,2

b)

2,3,2

c)

4,2,2

d)

4,3,2

40.

Balance this equation

_ S + _ O3 → _ SO2


Note: Write the coefficient "1" to avoid ambiguity

(a)  

41.

Balance this equation

_ Zn + _ HCl → _ ZnCl2 + _ H2


Note: Write the coefficient "1" to avoid ambiguity

(a)  

42.

Balance this equation

_ C5H12 + _ O2 → _ CO2 + _ H2O


Note: Write the coefficient "1" to avoid ambiguity

(a)  

43.

How do you write the balanced equation of burned propane (C3H8) in the presence of oxygen to produce water and carbon dioxide?

a)

C3H8 + O2 → H2O + CO2

b)

C3H8 + O2 → 4H2O + 3CO2

c)

C3H8 + 5O2 → 4H2O + 3CO2

d)

C3H8 + 3O2 → 2H2O + 3CO2

44.

Balance the equation below

_C + _H2O → _CH4 + _CO2

Note: Write the coefficient "1" to avoid ambiguity

(a)  

45.

Balance the equation below

_ WO3 + _H2 → _W + _H2O

Note: Write the coefficient "1" to avoid ambiguity

(a)  

46.

Balance this equation:

F3+H3-->_HF

a)

2

b)

3

c)

4

d)

6

47.
Which problem is balanced?
(Check ALL answers)
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
48.
Balance this equation
_Al +_HCl --> _H2 +_AlCl3
a)
2, 6, 3, 2
b)
it is already balanced
c)
4, 12, 3, 4
d)
2, 1, 4, 5
49.
Balance this equation.
_Mg + _Cl2 --> _MgCl2
a)
1, 2,1
b)
already balanced
c)
2,1,1
d)
1,1,2
50.

Balance this equation, CaCO3(s) → CaO(s) + CO2(g)?

a)

3,1,2

b)

1,1,1

c)

1,3,1

d)

2,6,3

51.

Balance this equation, AlCl3 + NaOH → Al(OH)3 + NaCl

a)

3,1,3,1

b)

1,3,3,1

c)

1,1,1,3

d)

1,3,1,3

52.

Balance the following equation: Cr(s) + Fe(NO3)2 (ag) → Fe(s) + Cr(NO3)3 (ag)

a)

2,3,3,2

b)

2,3,2,3

c)

4,6,6,2

d)

1,3,3,1

53.
Fill in the blanks with coefficient:
PCl5+_ H2O→_ HCl+H3PO4
a)
4, 5
b)
1, 6
c)
3, 8
d)
2,2
54.

What type of reaction is Fe + Cl2 → FeCl3

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

e)

None of these

55.

What type of reaction is C2H2 + O2 → CO2 + H2O

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

e)

None of these

56.

What type of reaction is BF3 + Li2SO3 → B2(SO3)3 + LiF

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

e)

None of these

57.

What type of reaction is Ag2O → Ag + O2

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

e)

None of these

58.

What type of reaction is C5H10 + O2 → CO2 + H2O

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

e)

None of these

59.

What type of reaction is Zn + HCl → H2 + ZnCl2

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

e)

None of these

60.

What type of reaction is H2 + N2 → NH3

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

e)

None of these

61.

What type of reaction is (NH2)3PO4 + Pb(NO3)4 → NH4NO3 + Pb3(PO4)4

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

e)

None of these

62.

What type of reaction is FeBr3 + H2SO4 → HBr + Fe2(SO4)3

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

e)

None of these

63.

What type of reaction is Fe + H2SO4 → H2 + FeSO4

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

e)

None of these

64.

What type of reaction is Mg + Br2 → MgBr2

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

e)

None of these

65.

What type of reaction is KClO3 → KCl + O2

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

e)

None of these

66.

What type of reaction is K2CO3 → K2O + CO2

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

e)

None of these

67.

What type of reaction is CH4 + O2 → CO2 + H2O

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

e)

None of these

68.

What type of reaction is NaOH + HCl → H2O + NaCl

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

e)

None of these

69.

What type of reaction is SeCl6 + O2 → SeO2 + Cl2

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

e)

None of these

70.
What two factors govern whether a collision between reacting particles will be effective?
a)
orientation and potential energy 
b)
kinetic energy and temperature 
c)
kinetic energy and orientation 
d)
potential energy and kinetic energy 
71.
Under the collision theory, the particles must collide with  ____ and ____ for a reaction to occur.
a)
sufficient rate and sufficient energy
b)
sufficient surface area and correct orientation
c)
sufficient catalyst and sufficient energy
d)
sufficent energy and correct orientation
72.
More collisions correspond to a: 
a)
Faster reaction rate  
b)
Slower reaction rate
c)
Constant reaction rate 
d)
None of the above
73.
Which of the following is NOT a factor affecting reaction rate?
a)
temperature
b)
catalysts
c)
particle size
d)
polarity
74.
Which of the following factors increases only the effectiveness of collisions?
a)
temperature
b)
catalysts
c)
concentration
d)
particle size
75.
Reaction rate means...
a)
amount of product formed
b)
speed of reaction
c)
concentration of reacting particles
d)
combining reactants with products
76.
Which of the following increase the reaction rate?
a)
less surface area
b)
lower temperature
c)
an inhibitor
d)
increased concentration
77.
What makes something radioactive?
a)
elements with an atomic number above 81
b)
an unstable nucleus
c)
contaminated sewage
d)
It decays over time
78.

A radioactive nuclide has a ____ stable nucleus than a non-radioactive nucleus of the same element.

a)

more

b)

less

c)

identical

d)

small

79.
Has the symbol
a)
Alpha
b)
Beta 
c)
Gamma
80.
Which type of nuclear radiation is being emitted here?
a)
Alpha
b)
beta
c)
gamma 
d)
none
81.
Which type of nuclear radiation is being emitted here?
a)
alpha
b)
beta
c)
gamma
d)
none
82.
What particle completes this reaction?
a)
alpha particle
b)
beta particle
c)
gamma particle
d)
neutron
83.

Why does alpha decay occur?

a)

The nucleus is too large to be stable

b)

The proton to neutron ratio is unstable

c)

The nucleus is in an excited state. This usually follows other types of decay.

84.

How do you solve the following problem: How many grams are there in 7.5 moles of H2SO4?

a)

Convert liters to moles then moles to grams

b)

Convert particles to moles then moles to grams

c)

Convert moles to grams

d)

Convert grams to moles

85.
Question Image

Match the following...

a)

You convert moles to grams by...

1.

multiplying by the molar mass

b)

You convert liters to moles by...

2.

dividing by 22.4L

c)

You convert moles to particles by...

3.

multiplying my avagadro's constant

d)

You convert grams to moles by...

4.

dividing by the molar mass

e)

You convert moles to liters by...

5.

multiplying by 22.4L

86.
Question Image

Match the following...

a)

You convert moles to grams by...

1.

multiplying by the molar mass

b)

You convert liters to moles by...

2.

dividing by 22.4L

c)

You convert moles to particles by...

3.

multiplying my avagadro's constant

d)

You convert grams to moles by...

4.

dividing by the molar mass

e)

You convert moles to liters by...

5.

multiplying by 22.4L

87.
How many atoms of iodine are in a mole of iodine?
a)
53
b)
63.55g
c)
126.9
d)
6.02 x 1023
88.
The number 6.02 x 1023 is called...
a)
Obama's number
b)
Bohr's number
c)
Trump's number
d)
Avogadro's number
89.
In what field of science do we most often use the mole?
a)
zoology
b)
botany
c)
chemistry
d)
biology
90.

How many moles are in 8.30 X 1023 molecules of H2O?

a)

1.38 X 1023 moles H2O

b)

1.38 moles H2O

c)

2 moles H2O

d)

1 mole H2O

91.

How many moles there are in 5.68 x 1024 formula units of AlCl3?

a)

3.42 x 1024 moles

b)

9.44 x 1024 moles

c)

9.44 moles

d)

3.42 moles

92.
Molar mass is in units of ________.
a)

grams

b)

grams/mole

c)

mole

d)

moles/gram

93.

What is the mass of 2.50 mole of oxygen gas O2?

a)

40 g

b)

80 g

c)

16 g

d)

32 g

94.
How many moles are present in 32.3 grams of carbon dioxide (CO2)?
a)

44.01 moles

b)

1421.52 moles

c)

32.3 moles

d)

0.73 moles

95.
What is the mole used for? 
a)
To measure the amount of grams in a substance
b)
To measure the amount of atoms or molecules in a substance
c)
To measure the amount of energy in a substance
d)
To measure the amount of bonding in a substance 
96.
How many atoms are in 1 mole of NaCl? 
a)
6.02 x 1023
b)
58 
c)
11
d)
17
97.
How are the mole and atomic masses of elements related?  
a)
The atomic mass of any substance is always equal to 1 mole of that substance 
b)
The atomic mass added up with itself by 6.02 x 1023 equals the amount of atoms
c)
The atomic mass is the amount of protons plus number of atoms
d)
Atoms combined make up molecules, which are the measurement of atomic masses 
98.

How many molecules are in 2.5 mol of NaCl?

a)

1.51x1023

b)

146

c)

4.15

d)

1.51x1024

99.

At STP, 1 mol of gas has a volume of

a)

34L

b)

22.4L

c)

60L

d)

0.6L

100.

Determine the volume, in liters, of 1.2 mole SO2 gas at STP.

a)

13 L

b)

26 L

c)

6.5 L

101.

Match the following units to their correct category.

a)

Grams

1.

Mass

b)

Liters at STP

2.

Volume

c)

Units, Atomes, Molecules

3.

Particles

102.
What is the molar mass of NaOH?
a)
40 g/mol
b)
38.989 g/mol
c)
23.998 g/mol
d)
57.004 g/mol
103.
What is the molar mass of Ca(OH)2 to the ones place?
a)
58
b)
74
c)
329
d)
1360
104.

What is the molar mass of Fe(NO3)2? (Two decimal places, no units)

(a)  

105.

What is the molar mass of CuSO4? (Two decimal places, no units)

(a)  

106.

What is the molar mass of CH3OH? (Two decimal places, not units)

(a)  

107.

How many atoms of oxygen are in Ca3(PO4)2?

(a)  

108.

How many atoms of oxygen are in Mg(OH)2?

(a)  

109.

What is the molar mass of UF6?

a)

101 g/mol

b)

238 g/mol

c)

257 g/mol

d)

352 g/mol

110.

Calculate the molar mass of Ba(C2H3O2)2

a)

255.3 g/mol

b)

237.3 g/mol

c)

228.3 g/mol

d)

196.3 g/mol

111.

Calculate the molar mass for Al(OH)3

a)

78.0 g/mol

b)

72 g/mol

c)

28 g/mol

d)

25 g/mol

112.
What is the mass of one mole of aluminum chloride (remember to determine the correct formula first)?
a)
62.435g
b)
116.399g
c)
133.341g
d)
97.888g
113.
What is the molar mass of BF3?
a)
11 g/mol
b)
49 g/mol
c)
68 g/mol
d)
57 g/mol
114.

What is the molar mass of Mg(OH)2

a)
40 g/mol
b)
64 g/mol
c)

58 g/mol

d)
63 g/mol
115.
What is the molar mass of Al2(CO3)3
a)
234 g/mol
b)
138 g/mol
c)
210 g/mol
d)
222 g/mol
116.

What is the molar mass of Al(NO3)3?

a)

62.01 g/mol

b)

88.99 g/mol

c)

151.00 g/mol

d)

213.01 g/mol

117.

What is the molar mass of Fel2?

a)

55.85 g/mol

b)

126.90 g/mol

c)

239.65 g/mol

d)

309.65 g/mol

118.

What is the molar mass of Ca(OH)2?

a)

58.10 g/mol

b)

73.09 g/mol

c)

74.10 g/mol

d)

114.18 g/mol

119.

What is the molar mass of (NH4)2S?

a)

57.18 g/mol

b)

68.17 g/mol

c)

32.07 g/mol

d)

17.04 g/mol

120.

What is the molar mass of CuBr2?

a)

145.23 g/mol

b)

122.54 g/mol

c)

223.35 g/mol

d)

213.54 g/mol

121.

What is the molar mass of SrS?

a)

87.62 g/mol

b)

119.69 g/mol

c)

151.76 g/mol

d)

32.07 g/mol

122.

What is the percent by mass of oxygen in MgO? Hint: The attached image is an example of a worked problem other than this one.

a)

20%

b)

40%

c)

50%

d)

60%

123.
What is the percent by mass of magnesium in MgO?
a)
20%
b)
40%
c)
50%
d)
60%
124.
What is the percent by mass of fluorine in CaF2 (gram-formula mass = 78 g/mol)?
a)
24%
b)
49%
c)
51%
d)
65%
125.
What is the percent composition by mass of sulfur in the compound MgSO4 (gram formula mass = 120 g/mol)?
a)
20%
b)
27%
c)
46%
d)
53%
126.
What is the percent composition by mass of oxygen in the compound MgSO4 (gram formula mass = 120 g/mol)?
a)
20%
b)
27%
c)
46%
d)
53%
127.
In which compound is the percent composition by mass of Cl equal to 42%?
a)
HClO (gram formula mass = 52 g/mol)
b)
HClO2 (gram formula mass = 68 g/mol)
c)
HClO3 (gram formula mass = 84 g/mol)
d)
HClO4 (gram formula mass = 100 g/mol)
128.
Find the percent composition of Cu2S?
a)
%Cu= 67.987 %S= 32.013
b)
%Cu= 79.854   %S= 20.145
c)
%Cu= 35.946   %S= 64.054
129.
What is the percent composition of Benzene, C6H6?
a)
C = 50%
H = 50%
b)
C = 85.7 %
H = 14.3%
c)
C = 92.2%
H = 7.8%
d)
C = 71.9%
H = 28.1%
130.
What is the empirical formula for the following:
Pb5Cr5O20
a)
Pb2Cr2O10
b)
PbCr2O7
c)
Pb9Cr4O2
d)
PbCrO4
131.

Which element has an abundance of 39.03% in the compound sodium phosphate, Na3PO4

a)

Na

b)

P

c)

O

d)

None of the above

132.

Which element in the compound potassium cyanide, KCN, has a percent composition of 60.97%?

a)

K

b)

C

c)

N

d)

None of the above

133.
What is the molarity of 3 mole of hydrochloric acid in 3 L of water. 
a)
3
b)
1
c)
6
d)
9
134.
What is the molarity of 4 grams of sodium chloride in 3,800 mL of solution?
a)
0.018 M
b)
0.018 mol
c)
1.052 M
d)
1.052 mol
135.
The ___ is the thing being dissolved
a)
solute
b)
solvent
136.
True or false? Insoluble means that two substances can dissolve in one another.
a)
true
b)
false
137.
Which sweet tea would you expect to taste the sweetest?
a)
1M
b)
3M
c)
3.1M
d)
2.5M
138.
What is the formula for molarity?
a)
moles/grams
b)
moles/kilograms
c)
moles/milliliters
d)
moles/liters
139.
Molarity is measured in
a)
moles per kg
b)
mols per L
c)
moles per kJ
d)
moles per mL
140.
How many L are required to make 3.5 M hydrochloric acid using 1.1 moles? 
a)
3.18 L
b)
0.31 L
c)
3.85 L
d)
4.6 L
141.
If you have 0.045 L of 0.465 M potassium bromide. How many moles of potassium bromide are present?
a)
20.9 mol
b)
0.021 mol
c)
0.02 mol
d)
0.0209 mol
142.
What is the molarity in 650. ml of solution containing 63 grams of sodium chloride?
a)
2.4 M
b)
0.86 M
c)
1.7 M
d)
0.54 M

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