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Comprehensive Chemistry

Total questions: 62

Worksheet time: 53mins

Name
Class
Date
1.

Chemical Reaction

a)

a substance formed as a result of a chemical reaction

b)

a change in matter that produces one or more new substances

c)

the process in which substances undergo chemical changes that result in the formation of new substances

d)

a substance that enters into a chemical reaction

2.

Chemical Equation

a)

A representation of a chemical reaction

b)

the starting materials in a chemical reaction

c)

the new substances that are formed in a chemical reaction

d)

tells how many atoms, molecules, or formula units take part in a reaction

3.

The Law of Conservation of Matter

a)

tells how many atoms of an element are contained in one molecule or formula unit.

b)

the starting materials in a chemical reaction

c)

the new substances that are formed in a chemical reaction

d)

A law stating that atoms are not created or destroyed during a chemical reaction.

4.

Is the equation balanced?: 2H2O + O2 --> 4MgO + 3Fe

a)

yes

b)

no

5.

Is this equation balanced?

2Al +6HCl --> 3H2 +2AlCl3

a)

Yes

b)

No

6.

The coefficient in 3H2O is

a)

6

b)

5

c)

2

d)

3

7.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
8.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
9.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
10.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
11.

What does the Law of Conservation of Mass state?

a)

Matter cannot be created or destroyed in a chemical reaction.

b)

Matter can only be destroyed in a chemical reaction.

c)

Matter can only be created in a chemical reaction.

d)

Matter can be created and destroyed in a chemical reaction.

12.
What is the left part of a chemical equation called?
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
13.
What is the right part of a chemical equation called...
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
14.
What is the total number of atoms present in 5Na3PO4
a)
5
b)
40
c)
55
d)
8
15.
How many Mn atoms are found in the following compound?
3Cr(MnO4)6
a)
3
b)
4
c)
6
d)
18
16.
What is the little number after an element in a chemical equation called.
Example: H2
a)
Coefficient 
b)
Subscript
c)
Atom
d)
Equation
17.
Is the following equation balanced?...
Al + O2 --> 2Al2O3
a)
Yes!
b)
No!
18.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
19.
Element or compound?
H2O
a)
Element
b)
Compound
20.
Element or compound?
O2
a)
Element
b)
Compound
21.
What is the number before a chemical formula called?
Ex: 2H2 + O2 --> 2H2O
a)
Coefficient
b)
Subscript
c)
Atom
d)
Equation
22.
How many aluminum atoms are in Al2(SO4)3?
a)
1
b)
2
c)
3
d)
4
23.
In which of these compounds are there twice as many oxygen atoms as hydrogen atoms?
a)
H3PO4
b)
H2SO4
c)
HClO3
d)
H2O
24.
How many atoms are in the neurotransmitter serotonin? The formula for serotonin is C10H12N2O
a)
10
b)
20
c)
25
d)
23
25.
What information could a student determine from only the chemical formula of a protein?
a)
The color of the protein
b)
The number of molecules in each sequence of the protein
c)
The physical arrangement of atoms in the structure of the protein
d)
The number of atoms of each element in the protein
26.
Is the following equation balanced?
2C2H2 + 5O2 --> 4CO2 + 2H2O
a)
yes
b)
no
27.
Is the following equation balanced?
4Fe + 3O2 --> 2Fe2O3
a)
yes
b)
no
28.
Is the following reaction balanced?
NaHCO3 --> Na2CO3 + H2O + CO2
a)
yes
b)
no
29.
Is the following reaction balanced?
2CH3OH + 3O2 --> 2CO2 + 4H2O
a)
yes
b)
no
30.
Which of the following equations are correctly balanced?
a)
12CO2 +H2O --> C6H12O6 + O2
b)
CO2 + 9H2O --> C6H12O6 + O2
c)
CO2 + H2O --> 3C6H12O6 + O2
d)
6CO2 + 6H2O --> C6H12O6 + 6O2
31.

How many elements are in C6H12O6?

a)

3

b)

6

c)

12

d)

24

32.

Is the equation balanced?

2H2 + O2 --> 2H2O

a)

Yes

b)

No

33.
What is the name of this element?
a)
Helium
b)
Hydrogen
c)
Argon
d)
Silver
34.

What element is represented in this Bohr Model?

a)

Carbon

b)

Hydrogen

c)

Aluminum

d)

Lithium

35.
What is the name of this element?
a)
Lithium
b)
Boron
c)
Carbon
d)
Neon
36.
What is the name of this element?
a)
Beryllium
b)
Boron
c)
Barium
d)
Bromine
37.
What is the mass number of this atom?
a)
1
b)
3
c)
4
d)
7
38.
What is the atomic number of this atom?
a)
2
b)
4
c)
6
d)
none of the above
39.
What group does this element belong to?
a)
Group 1: Alkali metals
b)
Group 18: Noble Gases
c)
Group 2: Alkaline-Earth Metals
d)
Group 17: Halogens
40.
Identify this atom.
a)
Lithium
b)
Boron
c)
Carbon
d)
Neon
41.
a)
energy levels
b)
valence electrons
c)
protons
d)
neutrons
42.
a)
energy levels
b)
valence electrons
c)
protons
d)
neutrons
43.
a)
Same group
b)
Same period
44.
a)
Group 1
b)
Group 17
c)
Group 2
d)
Group 18
45.
a)
Group 1
b)
Group 17
c)
Group 18
d)
Group 2
46.
a)
Group 1
b)
Group 17
c)
Group 18
d)
Group 2
47.
a)
Metals
b)
Nonmetals
c)
Metalloids
48.
a)
Metals
b)
Nonmetals
c)
Metalloids
49.
a)
Metals
b)
Nonmetals
c)
Metalloids
50.
a)
Metals
b)
Nonmetals
c)
Metalloids
51.
a)
Metals
b)
Nonmetals
c)
Metalloids
52.
a)
Metals
b)
Nonmetals
c)
Metalloids
53.
True or False - Protons and Neutrons have about the same mass.
a)
True - They have about the same mass
b)
False - They do not have about the same mass
54.
Which two subatomic particles make up the nucleus of an atom?
a)
Protons and Electrons
b)
Neutrons and Electrons
c)
Electrons and Protons
d)
Protons and Neutrons
55.
Where are the Electrons found in the structure of an atom?
a)
In the nucleus
b)
In spaces around the nucleus
56.
How many electron shells/levels does this atom have?
a)
1
b)
2
c)
3
d)
4
57.
What is the formula to solve for the neutron?
a)
Mass + Atomic Number= Neutrons
b)
Mass x Atomic Number = Neutrons
c)
Mass - Atomic Number = Neutrons
d)
Mass + Number of Protons = Neutron
58.
How many neutrons does oxygen have?
a)
16
b)
15.99
c)
8
d)
Doesn't contain any neutrons
59.
How many neutrons are in a Gold atom?
a)
79
b)
196
c)
118
d)
275
60.

How many neutrons does it have?

a)

77

b)

78

c)

54

d)

131

61.

How many neutrons does it have?

a)

45

b)

44

c)

34

d)

78

62.

How many neutrons does it have?

a)

16

b)

15

c)

30

d)

31

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