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Chemistry Review 2024

Total questions: 71

Worksheet time: 2hrs 16mins

Name
Class
Date
1.
What is the molar mass of C6H12O6?
a)

180.18 g/mol

b)

180.12 g/mol

c)

180.24 g/mol

d)

180.06 g/mol

2.
If you start with atoms of NaOH and are going to moles of NaOH, how many steps is it?
a)
1
b)
2
c)
3
d)
4
3.
Using the following equation:
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from  6 moles H2? 
a)
4 moles Fe
b)
6 moles Fe
c)
9 moles Fe
d)
2 moles Fe
4.
N2 +  3H2 → 2NH3 
How many moles of hydrogen are needed to react with 2 moles of nitrogen?
a)

6 mol H

b)

2 mol H

c)

3 mol H

d)

1 mol H

5.
2H2   +   O2  →  2H2O
How many moles of water can be produced if 8 moles H2 are used?
a)
4 moles
b)
8 moles
c)
16 moles
d)
2 moles
6.
2 NaClO3 (s) --> 2NaCl (s) +3 O2 (g)  
12.00 moles of NaClO3 will produce how many grams of O2?
a)
256 g of O2
b)
576 g of O2
c)
288 g O2
7.
B2H6 + 3O2 -->2 HBO2 + 2 H2O
 What mass of O2 will be needed to burn 36.1 g of B2H6?
a)
13.8 g O2
b)
3.86 mol of O2
c)
124 g O2
8.
4 Al + 3 O2 –> 2 Al2O3  How much aluminum would be needed to completely react with 45 grams of O2?
a)
1.05 moles
b)
3.75 moles
c)
1.875 grams
d)
1.875 moles
9.
2Al + 3H2SO4 -> Al2(SO4)3 + 3H2
How many grams of aluminum sulfate would be formed if 250g H2SO4 completely reacted with aluminum?
a)
0.85 g
b)
290 g
c)
450 g
d)
870 g
10.
Mg(s) + 2 HCl(aq)  -->  MgCl₂(aq)   + H₂(g)
How many moles of HCl are consumed in the production of 7.5 moles of MgCl₂?
a)
3.8 moles
b)
15 moles
c)
7.5 moles
d)
23 moles
11.
Balance the following reaction :
 
CaC₂(s)   +   H₂O(l)   -->   C₂H₂(g)   +   Ca(OH)₂(aq)
a)
1,2,2,2
b)
1,2,1,1
c)
2,1,1,1
d)
2,1,2,1
12.
 CaC₂(s) + 2H₂O(l)   -->   C₂H₂(g)   + Ca(OH)₂(aq)
how many grams of Ca(OH)₂ would be formed with 3.20 moles of CaC₂?
a)
119 g
b)
21.2 g
c)
114 g
d)
237 g
13.
Use the following equation:
NaIO3(aq) + 6HI(aq) --> 3I2(s) + NaI(aq) + 3H2O(l)
How many moles of iodine can be made from 6.55 moles of NaIO3?
a)
4.55 moles I2
b)
23.18 moles I2
c)
19.65 moles I2
d)
34.99 moles I2
14.
Using the following equation:
4NH3(g) + 5O2(g) --> 4NO(g) + 6H2O(l)
How many grams of oxygen gas are needed to react with 56.8 grams of ammonia?
a)
45.08 g O2
b)
133.33 g O2
c)
260.77 g O2
d)
75.92 g O2
15.
___C3H8 +___O2 --> ___CO2 + ___H2O
a)
1,5,3,4
b)
2,10,6,8
c)
already balanced
d)
1,5,5,4
16.
__Al + __Fe3N2 -->__AlN + __Fe
a)
already balanced
b)
4,2,4,6
c)
2,1,2,3
d)
1,2,1,3
17.
__Na + __Cl2 --> __NaCl
a)
1,1,2
b)
2,1,2
c)
2,1,1
d)
already balanced
18.
__H2O2 --> __H2O + __O2
a)
already balanced
b)
2,1,1
c)
2,2,1
d)
2,1,2
19.
__BF3 + __Li2SO3 --> __B2(SO3)3 + __LiF
a)
2,3,1,3
b)
2,3,1,6
c)
4,4,2,12
d)
3,3,1,9
20.
The number of atoms you begin with in a chemical reaction ...
a)
must be the same as the number of  atoms you end with
b)
must be an even number
c)
can be different to the number you finish with
d)
changes depending on how much energy is formed
21.

Which type of reaction is:

2 NH3 + H2SO4 → (NH4)2SO4

a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Double Displacement
22.

Which type of reaction is:

2 H3AsO4 → As2O5 + 3 H2O

a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Combustion
23.
Which type of reaction is: C2H4 + 3 O2 → 2 CO2 + 2 H2O
a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Combustion
24.

Which type of reaction is:

4 (NH4)3PO4 + 3 Pb(NO3)4 → 12 NH4NO3 + Pb3(PO4)4

a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Double Displacement
25.

Which type of reaction is:

2 K + MgBr2 → 2 KBr + Mg

a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Double Displacement
26.
Provides evidence that a chemical reaction has occurred. 
a)
dissolving 
b)
melting
c)
formation of a gas
d)
bending
27.
Fill in the blanks with coefficient:
PCl5+_ H2O→_ HCl+H3PO4
a)
4, 5
b)
1, 6
c)
3, 8
d)
2,2
28.
Balance this equation
_Zn+_HCl-->_ZnCl2 +_H2
a)
1,1,2,1
b)
1,1,1,2
c)
1,2,1,1
d)
2,1,1,1
29.

The two sides of a chemical equation are called?

a)

Reactants (left) and Products (right)

b)

Ingredients (left) and Product (right)

c)

Cations and Anions

d)

Reactants (left) and Results (right)

30.
Which problem is balanced?
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
31.

What is the molar mass of NaCl?

a)

49.46 g/mol

b)

58.44 g/mol

c)

152.92 g/mol

d)

161.90 g/mol

32.

What is the molar mass of MgF2?

a)

62.31 g/mol

b)

67.62 g/mol

c)

43.31 g/mol

d)

86.62 g/mol

33.

What is the molar mass of Li2O?

a)

22.94 g/mol

b)

29.88 g/mol

c)

45.88 g/mol

d)

38.94 g/mol

34.

What is the molar mass of Al2O3?

a)

42.98 g/mol

b)

69.96 g/mol

c)

85.96 g/mol

d)

101.96 g/mol

35.

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

36.

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

37.

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

38.

What is the molar mass of NaOH?

a)

40.00 g/mol

b)

50.00 g/mol

c)

60.00 g/mol

d)

70.00 g/mol

39.

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

40.

What is the molar mass of H2?

a)

1.01 g/mol

b)

2.02 g/mol

c)

16.00 g/mol

d)

32.00 g/mol

41.

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

42.

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

43.

Tiny pieces of matter that everything is made of

a)

model

b)

atoms

c)

substances

44.

An object, diagram, or computer program that helps us understand something by making it simpler or easier to see

a)

molecule

b)

property

c)

model

45.

Something that can be observed about a substance, such as color, smell, or boiling point

a)

property

b)

reactant

c)

molecule

46.

A process in which atoms rearrange to form new substances.

a)

extended structure

b)

boiling point

c)

chemical reaction

47.

Something that is made of all the same atoms or groups of atoms

a)

substance

b)

atoms

c)

scale

48.

A group of atoms joined together in a particular way

a)

product

b)

molecule

c)

fertilizer

49.

In a chemical equation the reactants are on the left side of the arrow. Are the reactants the beginning substances or the ending substances?

a)

beginning

b)

ending

50.

In a chemical equation the products are on the right side of the arrow. Are the products the beginning substances or the ending substances?

a)

beginning

b)

ending

51.

During a chemical reaction, atoms can

a)

be destroyed to form a new substance

b)

be created to form a new substance

c)

be rearranged to form a new substance

52.

Burning paper is an example of a

a)

boiling point

b)

chemical reaction

c)

extended structure

53.
The time required for half of a sample of a radioactive substance to undergo nuclear decay is called __________.
a)
Decay Time
b)
Half Life
c)
Atoms don't decay
d)
Isotope time
54.
Which type of radiation is most penetrating?
a)
Gamma
b)
They are equal
c)
Beta
d)
Alpha
55.
Which produces more energy--nuclear fission or nuclear fusion?
a)
Fusion
b)
Fission
c)
They produce the same amount
d)
It depends on the elements used
56.
When one large nucleus is split into two smaller nuclei, the process is nuclear _____.
a)
Fusion
b)
Fission
c)
Tracing
d)
Decay
57.
Two or more nuclei combine to form one larger nucleus in the process of nuclear _____.
a)
Fusion
b)
Fission
c)
Tracing
d)
Decay
58.
Beta particles have a _____ charge
a)
+1
b)
0
c)
-1
d)
+2
59.

Which type of reaction does the diagram illustrate?

a)

Fission

b)

Fusion

c)

Alpha Decay

d)

Beta Decay

60.

For the balanced equation, which particle is represented by X?

a)

0-1 e

b)

11 H

c)

42 H

d)

10 n

61.

Which reaction represents fusion?

a)
b)
c)
d)
62.

Which reaction represents fission?

a)
b)
c)
d)
63.
What is the symbol for an alpha particle?
a)
42He
b)
0-1e
c)
0+1 e
d)
10n
64.
What is the missing isotope that will balance the following nuclear equation?
94Be  +  11H →  _____  +  42He
a)
105B
b)
105Ne
c)
63Li
d)
63C
65.
Has the highest penetrating power.  Can penetrate our body.  Even several cm thick of lead or several meters thick of concrete cannot stop all of it.
a)
Alpha
b)
Beta
c)
Gamma
66.
During which war did the U.S. create the atomic bomb?
a)
World War I
b)
World War II
c)
Korean War
d)
Vietnam War
67.
Hiroshima and Nagasaki are the 2 cities bombed with the Atomic bomb?
a)
True
b)
False
68.

The United States program to build the nuclear bomb was called...?

a)

The Manhattan Project

b)

Bomb Project

c)

New York Project

d)

Brooklyn Project

69.

What can be caused by the fallout from nuclear weapons?

a)

Nuclear winter

b)

Radiation

c)

cancer

d)

all of the above

70.

Who is known as the father of atomic bombs

a)

J. Robert Oppenheimer

b)

Edward Teller

c)

Paul Tibbets

d)

Andrei Sakharov

71.

Which of the following is the worlds strongest nuclear weapon

a)

Little Boy

b)

Fat Man

c)

B83

d)

Tsar Bomba

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