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Balancing and types of equations

Total questions: 70

Worksheet time: 2hrs 50mins

Name
Class
Date
1.
What coefficient should be used to make the following equation balanced?
N2+O2--> _NO 
a)
1
b)
2
c)
3
d)
4
2.

Which equation is balanced?

a)

PbO2 + 2H2

b)

SO2 + H20 --> H2SO4

c)

2Na + 2H2O --> 2NaOH + H2

3.

Balance this 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

4.

What are the coefficients that would properly balance this equation?

__Ca + __H2O --> __Ca(OH)2 + __H2

a)

2,1 --> 2,1

b)

1,2 --> 1,1

c)

1,2 --> 2,4

d)

1,2 --> 2,1

5.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__CO + __Fe2O3--> __Fe + __CO2
a)
3,1 --> 2,3
b)
3,2 --> 1,1
c)
3,2 --> 2,4
d)
3,2 --> 2,1
6.

What are the coefficients that would properly balance this equation?

__AgNO3 + __H2S --> __Ag2S+ __HNO3

a)

2,1 --> 1,2

b)

1,2 --> 1,1

c)

1,2 --> 1,2

d)

1,2 --> 2,1

7.

What are the coefficients that would properly balance this equation?

__H2 + __S --> __H2S

a)

1,1 --> 1

b)

2,2 --> 2

c)

1,2 --> 1

d)

1,2 --> 2

8.

What are the coefficients that would properly balance this equation?

__Al + __O2--> __Al2O3

a)

4,1 --> 2

b)

4,3 --> 4

c)

3,4 --> 1

d)

4,3 --> 2

9.

Determine the coefficients to make the following equation balanced?

__N2 + __O2--> __NO

a)

1, 1, 1

b)

1, 1, 2

c)

2, 2, 2

d)

1, 2, 2

10.

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

11.

Balance the the following 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

12.

What type of reaction is the equation C + O2 → CO2?

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

13.

What type of reaction is the equation


2NaCl → 2Na + Cl2?

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

14.

What type of reaction is the equation

Cu + 2Ag(NO3) → 2Ag + Cu(NO3)

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

15.

What type of reaction is the equation


MgCl2 + Li2CO3 → MgCO3 + 2 LiCl

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

16.

What type of reaction is the equation


3Pb + 2H3PO4 → 3H2 + 1Pb3(PO4)2

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

17.

What type of reaction is the equation

3 HBr + 1 Al(OH)3 → 3 H­2O + 1 AlBr3

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

18.

What type of reaction is the equation

2 RbNO3 + BeF2 → Be(NO3)2 + 2 RbF

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

19.

What type of reaction is the equation

P4 + 3 O2 → 2 P2O3

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

20.

What equation has the following general formula:

AB → A + B

a)

Synthesis

b)

Decomposition

c)

Single Displacement

d)

Double Displacement

e)

Combustion

21.

What equation has the following general formula:

AB + CD → CB + AD

a)

Synthesis

b)

Decomposition

c)

Single Displacement

d)

Double Displacement

e)

Combustion

22.

What equation has the following general formula:
CxHy + O2 →  CO2 + H2O  + EC_xH_y\ +\ O_2\ \rightarrow\ \ CO_{2\ }+\ H_2O\ \ +\ E  

a)

Synthesis

b)

Decomposition

c)

Single Displacement

d)

Double Displacement

e)

Combustion

23.

What type of equation is shown by the following:
C11H24+17O2  →  11CO2 + 12H2O + EC_{11}H_{24}+17O_2\ \ \rightarrow\ \ 11CO_2\ +\ 12H_2O\ +\ E  

a)

Synthesis

b)

Decomposition

c)

Single Displacement

d)

Double Displacement

e)

Combustion

24.
Fill in the blanks with coefficient:
PCl5+_ H2O→_ HCl+H3PO4
a)
4, 5
b)
1, 6
c)
3, 8
d)
2,2
25.
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
26.
Balance this equation.
_Mg + _Cl2 --> _MgCl2
a)
1, 2,1
b)
already balanced
c)
2,1,1
d)
1,1,2
27.
Balance this equation
_N2 + _H2 --> _NH3
a)
1,2,3
b)
1,3,2
c)
1,1,2
d)
2,1,1
28.

What type of reaction is the equation


2NaCl → 2Na + Cl2?

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

29.

What type of reaction is the equation

Cu + 2Ag(NO3) → 2Ag + Cu(NO3)

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

30.

What type of reaction is the equation


MgCl2 + Li2CO3 → MgCO3 + 2 LiCl

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

31.
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
32.
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. 
33.
What is the little number after an element in a chemical equation called.
Example: H2
a)
Coefficient 
b)
Subscript
c)
Atom
d)
Equation
34.
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
35.
Which problem is balanced?
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
36.

Identify the type of reaction:

ZnCl2 + Mg --> Zn + MgCl2

a)

Precipitate

b)

Single Replacement

c)

Double Replacement

d)

Decomposition

37.

Identify the reaction type for the following equation:

K + F2 --> KF

a)

Double replacement

b)

Single Replacement

c)

Synthesis

d)

Decomposition

38.

Identify the reaction type:

C2H6 + O2 --> CO2 + H2O

a)

Double replacement

b)

Synthesis

c)

Acid base

d)

Combustion

39.

What is the type of reaction shown above?

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

40.
One reactant into several products.
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
41.
Two Reactants and One Product
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
42.

The correct coefficients to correctly balance the following equation

____ C7H16 + ____ O2 --> ____ CO2 + ____ H2O

from left to right would be:

a)

2, 22, 14, 16

b)

1, 5, 3, 4

c)

1, 15/2, 7, 8

d)

1, 11, 7, 8

43.
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
44.
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
45.

Which side of a chemical equation is the product side?

a)
Left (before the yields sign)
b)
Right (after the yields sign)
46.
Which side of a chemical equation is the reactant side?
a)
Left (before the yields sign)
b)
Right (after the yields sign)
47.
The Law of Conservation of Matter states that the total mass of the reactants should be 
a)
More than the mass of the products
b)
Equal to the mass of the products
c)
Ignored during the reaction
d)
Less than the mass of the products
48.
What are Chemical Reactions?
a)
It's when you mix substances.
b)
a process in which atoms rearrange to form new substances
c)
When something bubbles.
d)
letter and numbers showing the types and number of atoms
49.
the starting materials in a chemical reaction
a)
Products
b)
Reactants
c)
Starters
d)
Enders
50.
a substance that is formed as the result of a chemical reaction
a)
Product 
b)
Reactant
c)
Starters
d)
Enders
51.
AB + CD →AD + CB
a)
Double Replacement
b)
Single Replacement
c)
Synthesis
d)
Decomposition
52.

What mathematical function do coefficients perform in a balanced equation?

a)

addition

b)

multiplication

c)

subtraction

d)

division

53.

Which of the following is an example of a synthesis reaction?

a)
b)
c)
d)
54.

Which of the following is an example of a decomposition reaction?

a)
b)
c)
d)
55.

Which of the following is an example of a single replacement reaction?

a)
b)
c)
d)
56.

Which of the following is an example of a double replacement reaction?

a)
b)
c)
d)
57.

The red numbers in the image represent

a)

subscripts

b)

coeffiecients

c)

roman numerals

d)

none of the answer options are correct

58.

The blue numbers in the image represent

a)

subscripts

b)

coeffiecients

c)

roman numerals

d)

none of the answer options are correct

59.
Which problem is balanced?
(Check ALL answers)
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
60.
Is this balanced?
Al + O2 → 2Al2O3
a)
Yes
b)
No
61.

Balance this reaction:

____ Na3PO4 + ____ KOH ---> ____ NaOH + ____ K3PO4

a)

1,3,3,1

b)

1,3,2,1

c)

2,3,3,1

d)

1,1,3,1

62.

Which type of reaction is:

2 H3AsO4 → As2O5 + 3 H2O

a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Combustion
63.
Which type of reaction is: C2H4 + 3 O2 → 2 CO2 + 2 H2O
a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Combustion
64.

Which type of reaction is:

2 NaBr + Ca(OH)2 → CaBr2 + 2 NaOH

a)
Synthesis
b)
Single Displacement
c)
Double Displacement
d)
Combustion
65.

Balance the following:

____ H2SO4 + ____ NaNO2 → ____ HNO2 + ____ Na2SO4

a)
1,1,2,1
b)
1,2,2,1
c)
2,3,3,2
d)
4,3,2,1
66.

In the equation, 2Mg + O2 ---> 2MgO, which are the reactants?

a)

Mg and O2

b)

MgO

c)

Mg and MgO

d)

O and MgO

67.

Balance this equation:

​ (a)   Fe + ​ (b)   O2 --> ​ (c)   Fe2O3

Choose from the below words
4
3
2
1
0
68.

What are the coefficients that would properly balance this equation?

__C3H8 + __O2 --> __CO2 + __H2O

a)

2, 7 --> 6, 8

b)

1, 5 --> 3, 4

c)

2, 5 --> 4, 6

d)

1, 4 --> 2, 3

69.

Identify the type of reaction:

2Na + Cl2 --> 2NaCl

a)

Single Replacement

b)

Double replacement

c)

Synthesis

d)

Decomposition

70.

Determine the coefficients to balance the equation.

__Fe + __O2 --> __Fe2O3

a)

1, 1 --> 1

b)

2, 1 --> 1

c)

4, 3 --> 2

d)

3, 2 --> 1

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