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Worksheets

Balancing Chemical Reactions

Total questions: 16

Worksheet time: 1hrs 20mins

Name
Class
Date
1.

MgCl2 represents a chemical

a)

Element

b)

Chemical Formula

c)

Subscript

d)

Coefficient

2.

The substances listed on the right side of a chemical equation are the

a)

Coefficients

b)

Reactants

c)

Products

d)

Precipitates

3.
The substances listed on the left side of a chemical equation are the
a)
Products
b)
Coefficients
c)
Precipitates
d)
Reactants
4.
In chemical reactions, what does the principle of conservation of mass mean?
a)
Matter is not created or destroyed.
b)
The total mass of the reactants is greater than the total mass of the products.
c)
The total mass of the reactants is less than the total mass of the products.
d)
Matter is not changed.
5.

How many different kinds of elements are in C6H12O6?

a)

1

b)

2

c)

3

d)

4

6.

How many atoms of Carbon are in the following formula?

3C2H6

a)

3

b)

6

c)

9

d)

18

7.

How many atoms of Hydrogen are in the following formula?

3C2H6

a)

3

b)

6

c)

9

d)

18

8.
Which is the Law of Conservation of Matter?
a)
matter cannot be created or destroyed, it only changes form
b)
matter can be created but it cannot be destroyed, it never changes form
c)
matter can be destroyed but it cannot be created, it usually just changes form
d)
matter is an unproven theory created by Hans Geiger
9.

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

__Na + __F₂ → __NaF

a)

1, 2, 1

b)

2, 1, 2

c)

1,1,1

d)

2,2,2

10.

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

__Na + __MgF₂ → __NaF + __Mg

a)

2,1,1,2

b)

1,2,1,2,

c)

2, 1, 2, 1

d)

1,2,2,1

11.

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

___N₂ + __H₂ → __NH₃

a)

1,3,2

b)

1,2,3

c)

3,2,1

d)

1,2,1

12.

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

__Sn + __HF → __SnF₂ + __H₂

a)

2,1,1,2

b)

1, 2, 1, 1

c)

2,1,2,1

d)

1,2,1,2

13.

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

__Fe +__O₂ → __Fe₂O₃

a)

3,4,2

b)

4, 3, 2

c)

2,3,4

d)

4,2,3

14.

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

__CS₂ + __O₂ → __CO₂ + __SO₂

a)

3,1,2,1

b)

3,1,1,2

c)

2,1,1,3

d)

1, 3, 1, 2

15.

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

__MgS + __O₂ → __MgO + __SO₂

a)

3,2,2,3

b)

2,3,2,2

c)

2,3,2,3

d)

3,2,2,1

16.

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

__CH₄ + __O₂ → __CO₂ + __H₂O

a)

2,1,2,1

b)

2,1,1,2

c)

1,2,1,2

d)

1,2,2,1