WorksheetsBalancing Equations
Total questions: 18
Worksheet time: 18mins
Name
Class
Date
1.
Balance this equation.
_Mg + _Cl2 --> _MgCl2
_Mg + _Cl2 --> _MgCl2
a)
1, 2,1
b)
already balanced
c)
2,1,1
d)
1,1,2
2.
2H2 + O2 ----> 2H2O What is the product?
a)
------>
b)
2H2O
c)
2H2+ O2
3.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
4.
How many Magnesium are in 10MgCl2?
a)
10
b)
5
c)
20
5.
How many O's are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
6.
Number of N in (NH₄)₂CrO₄
a)
1
b)
2
c)
8
d)
16
7.
What is a coefficient?
a)
The small number on the right of the chemical symbol.
b)
The large number to the left of a formula.
8.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
9.
How many atoms of Carbon are in the compound C2H8O ?
a)
8
b)
2
c)
1
d)
11
10.
The law of conservation of matter states that
a)
chemical reactions change matter.
b)
in chemical reactions, the identity of reactants and products is conserved.
c)
atoms are neither created nor destroyed in chemical reactions.
d)
a chemical equation must be balanced.
11.
Is the following equation balanced or unbalanced?
Fe + S --> FeS
Fe + S --> FeS
a)
balanced
b)
unbalanced
12.
Which of the following is an unbalanced equation?
a)
CaCO3 --> CaO + CO2
b)
PbO2 + 2H2-->2Pb + H2O
c)
2Na+ 2H2O-->2NaOH + H2
d)
CS2 + 3O2 --> CO2 + 2SO2
13.
What is the part of the chemical equation in green called?
Fe + S --> FeS
Fe + S --> FeS
a)
products
b)
reactants
c)
yield
d)
chemical formula
14.
Is this balanced?...
Al + O2 --> 2Al2O3
Al + O2 --> 2Al2O3
a)
Yes!
b)
NO!
15.
What is a reactant?
a)
a volatile chemical
b)
a dangerous substance
c)
the substances you start with in a chemical reaction
d)
the substances that are formed by a chemical reaction
16.
What is a product?
a)
a fancy word for make-up
b)
a volatile chemical
c)
the substances you start with in a chemical reaction
d)
the substances that are formed by a chemical reaction
17.
What is the little number after an element in a chemical equation called.
Example: H2
Example: H2
a)
Coefficient
b)
Subscript
c)
Atom
d)
Equation
18.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
100 %
