wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Balancing equations

Total questions: 65

Worksheet time: 2hrs 10mins

Name
Class
Date
1.
How many Oxygens are in this molecule? 
(OH)2
a)
4
b)
1
c)
2
d)
3
2.
What are the smaller numbers that you CANNOT change in a chemical equation? 
a)
Coefficient
b)
Products
c)
Reactants
d)
Subscript
3.
What are the larger numbers that you CAN CHANGE in a chemical equation? 
a)
Coefficient 
b)
Products
c)
Reactants
d)
Subscripts
4.
What law governs the balancing of chemical equations? 
a)
Law of Energy
b)
Law of Conservation of Matter/Mass
c)
Law of Gravity
d)
Law of Matter Movement 
5.
What is the Law of Conservation of Mass?
a)
It states that no matter can be created or destroyed.
b)
It states that no energy can be created or destroyed.
c)
It states that matter can be created or destroyed.
d)
It states that no sound can be created or destroyed.
6.
What is a coefficient?
a)
The small number on the right of the chemical symbol.
b)
The large number in front of a chemical formula.
c)
The number in between the chemical symbols.
d)
The number behind a chemical formula.
7.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
8.
How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
9.
Is this balanced?
Al + O2 → 2Al2O3
a)
Yes
b)
No
10.
The substances listed on the right side of a chemical equation are the
a)
Yields
b)
Reactants
c)
Products
d)
Precipitates
11.
CaCO3 represents a chemical
a)
Symbol
b)
Formula
c)
Subscript
d)
Reaction
12.
The substances listed on the left side of a chemical equation are the
a)
Products
b)
Coefficients
c)
Precipitates
d)
Reactants
13.
In balancing chemical equations, we change
a)
Coefficients
b)
Subscripts
c)
Both can be changed
d)
None can be changed
14.
Which number should go in the blank?
Al(NO3)3 + _  NaOH -> Al(OH)3 + 3 NaNO3
a)
1
b)
2
c)
3
d)
0
15.

Determine the coefficients to balance the equation.

__Al +__HCl --> __H2 +__AlCl3

a)

2,6,3,2

b)

it's already balanced

c)

4,12,3,4

d)

2,1,4,5

16.

PCl5 + ___ H2O → ___ HCl + H3PO4

a)

4, 5

b)

1, 6

c)

3, 8

d)

2,2

17.

PCl5 + ___ H2O → ___ HCl + H3PO4

a)

4, 5

b)

1, 6

c)

3, 8

d)

2,2

18.

__ Al + __ FeO → Al2O2 + __ Fe

a)

1, 1, 2

b)

2,1,2

c)

2, 2, 2

d)

2,4,2

19.
 Mg  +  ___ HCl  →   MgCl2  +   H2
a)
1
b)
2
c)
3
d)
4
20.
Which side of a chemical equation is the reactant side?
a)
Left (before the yields sign)
b)
Right (after the yields sign)
21.
Which side of a chemical equation os the product side?
a)
Left (before the yields sign)
b)
Right (after the yields sign)
22.
Which problem is balanced?
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
23.
Balance this equation.
_SnO2 +_H2-->_Sn +_H2O
a)
1,1,2,1
b)
1,2,1,1
c)
1,2,1,2
d)
1,2,2,1
24.
Balance this equation.
_CF4 + _Br2 -- _CBr4 + _F2
a)
2,1,2,1
b)
1,2,2,1
c)
1,2,1,2
d)
2,2,2,2
25.
What is the little number after an element in a chemical equation called.
Example: H2
a)
Coefficient 
b)
Subscript
c)
Atom
d)
Equation
26.
What does the Law of Conservation of Mass state?
a)
Matter cannot be gained or lost in a chemical reaction.
b)
Matter can only be lost in a chemical reaction.
c)
Matter can only be gained in a chemical reaction.
d)
Matter can be gained and lost in a chemical reaction. 
27.
Is the equation balanced?: 2H2O + O2 --> 4MgO + 3Fe
a)
Yes
b)
No
28.
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
29.
Balance this equation.
_CH4 + _O2 --> _CO2 + _H2O
a)
1,2,1,1
b)
2,1,2,1
c)
1,2,1,2
d)
0,2,0,2
30.
Balance this equation.
_CF4 + _Br2 -- _CBr4 + _F2
a)
2,1,2,1
b)
1,2,2,1
c)
1,2,1,2
d)
2,2,2,2
31.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
32.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
33.
When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced
a)
charge
b)
subscript
c)
random number
d)
coefficient
34.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
35.

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)

36.
How many atoms are there TOTAL in:
H2SO4
a)
6
b)
5
c)
7
d)
3
37.

The substances that go into a reaction are called the _______.

a)

products

b)

reactants

38.

What coefficient should be used to make the following equation balanced?

N2+O2--> __?__NO

a)

1

b)

2

c)

3

d)

4

39.
Is the following equation balanced?
4Fe + 3O2 --> 2Fe2O3
a)
yes
b)
no
40.
What is the right part of a chemical equation called...
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
41.
Balance this equation:
 2Li + Cl2 -> LiCl
a)
2Li + Cl2 -> 4LiCl2
b)
2Li + Cl2 -> LiCl2
c)
2Li + Cl2 -> 2LiCl
42.

Which of the coefficients could be used to balance this equation?

__Ag2O →__ Ag +___O2

a)

2,4,1

b)

1,1,1

c)

2,1,2

d)

2,2,2

43.

​ MgF2 + ​ Li2CO3 → ​ MgCO3 + ​ (a)   LiF

Choose from the below words
2
1
3
44.

​ ​ Na3PO4 + ​ ​ (a)   KOH → ​ NaOH ​ + K3PO4

Choose from the below words
2
1
3
45.

P4 + ​ (a)   O4 → ​ (b)   P2O3

Choose from the below words
1
3
2
46.

​ (a)   RbNO3 + ​ BeF2 → ​ Be(NO3)2 + ​ (b)   RbF

Choose from the below words
2
1
3
47.

​ N2 + ​ ​ (a)   F2 → ​ (b)   NF3

Choose from the below words
2
1
3
48.

​ (a)   AlBr3 + ​ ​ (b)   K2SO4 → ​ (c)   KBr + Al2(SO4)3

Choose from the below words
2
1
3
6
49.

​ ​ (a)   Al + ​ ​ ​ (b)   HCl → ​ ​ (c)   H2 + ​ (d)   AlCl3

Choose from the below words
1
2
3
6
50.

PCl5 + ___ H2O → ___ HCl + H3PO4

a)

4, 5

b)

1, 6

c)

3, 8

d)

2,2

51.

__ Al + __ FeO → Al2O2 + __ Fe

a)

1, 1, 2

b)

2,1,2

c)

2, 2, 2

d)

2,4,2

52.
Balance this equation.
_SnO2 +_H2-->_Sn +_H2O
a)
1,1,2,1
b)
1,2,1,1
c)
1,2,1,2
d)
1,2,2,1
53.
Balance this equation.
_CF4 + _Br2 -- _CBr4 + _F2
a)
2,1,2,1
b)
1,2,2,1
c)
1,2,1,2
d)
2,2,2,2
54.

a)

Yes

b)

No

55.

a)

Yes

b)

No

56.

a)

Yes

b)

No

57.

a)

Yes

b)

No

58.

a)

Yes

b)

No

59.

a)

Yes

b)

No

60.

a)

Yes

b)

No

61.

a)

Yes

b)

No

62.

a)

Yes

b)

No

63.

a)

Yes

b)

No

64.

a)

Yes

b)

No

65.

Blanced?

a)

T

b)

F

Similar Resources on Wayground

Semester 2 Exam Study Guide

66 questions

Semester 2 Exam Study Guide

quiz

Worksheet

•

9th - 12th Grade

Chemistry Second Semester Exam Review

60 questions

Chemistry Second Semester Exam Review

quiz

Worksheet

•

10th Grade

Phy Sci Mid-term Exam Review

67 questions

Phy Sci Mid-term Exam Review

quiz

Worksheet

•

8th - 10th Grade

famous people

66 questions

famous people

quiz

Worksheet

•

KG - University

Double Displacement Reactions

70 questions

Double Displacement Reactions

quiz

Worksheet

•

10th - 12th Grade

Naming Chemical Compounds (Ionic, Acid and Covalent)

64 questions

Naming Chemical Compounds (Ionic, Acid and Covalent)

quiz

Worksheet

•

10th - 12th Grade

DC CHEM UNIT 3 REVIEW

64 questions

DC CHEM UNIT 3 REVIEW

quiz

Worksheet

•

10th Grade

Chem Final Exam Review

62 questions

Chem Final Exam Review

quiz

Worksheet

•

10th Grade - University