WorksheetsBalancing Equations Practice
Total questions: 12
Worksheet time: 12mins
Name
Class
Date
1.
Which side of a chemical equation is the reactant side?
a)
Left (before the yields sign)
b)
Right (after the yields sign)
2.
Which side of a chemical equation is the product side?
a)
Left (before the yields sign)
b)
Right (after the yields sign)
3.
At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?
a)
the product is doubled
b)
the product is half the mass of the reactants
c)
the mass is the same
d)
the mass changes depending on the reaction
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.
The red numbers in the image below represent ________
a)
subscripts
b)
coefficients
c)
Superscript
d)
None of the answers are correct
6.
The blue numbers in the image below represent ________
a)
Superscript
b)
coefficients
c)
subscripts
d)
none of the answers are correct
7.
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
8.
Number of C's in 2Na₂CO₃
a)
1
b)
2
c)
3
d)
5
9.
Balance this equation:
2Li + Cl2 -> LiCl
2Li + Cl2 -> LiCl
a)
2Li + Cl2 -> 4LiCl2
b)
2Li + Cl2 -> LiCl2
c)
2Li + Cl2 -> 2LiCl
10.
Which number should go in the blank?
_ H2 + O2 -> 2 H2O
_ H2 + O2 -> 2 H2O
a)
1
b)
2
c)
3
d)
0
11.
Is the following equation balanced or unbalanced ?
Al + O2 --> Al2O3
Al + O2 --> Al2O3
a)
Balanced
b)
Unbalanced
12.
____ H2 + ____ N2 ----> ____ NH3
a)
1, 2, 3
b)
3, 1, 2
c)
3, 2, 1
d)
1, 3, 2
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