WorksheetsBalancing Equations - Revision
Total questions: 10
Worksheet time: 24mins
Name
Class
Date
1.
What is the Law of Conservation of Mass?
a)
It states that matter cannot be created or destroyed.
b)
It states that energy cannot be created or destroyed.
c)
It states that matter can be created or destroyed.
d)
It states that sound can be created or destroyed.
2.
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.
3.
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
4.
What coefficient should be used to make the following equation balanced?
N2+O2--> _NO
N2+O2--> _NO
a)
1
b)
2
c)
3
d)
4
5.
Which problem is balanced?
(Check ALL answers)
(Check ALL answers)
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
6.
How many HCl molecules do you need to balance this equation?
Mg + __HCl ---> MgCl2 + H2
Mg + __HCl ---> MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
7.
Is this balanced?
Al + O2 → 2Al2O3
Al + O2 → 2Al2O3
a)
Yes
b)
No
8.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
9.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
10.
Is the following equation balanced?
2C2H2 + 5O2 ---> 4CO2 + 2H2O
a)
YES
b)
NO
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