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WorksheetsBalance Equations Basic
Total questions: 25
Worksheet time: 25mins
The calculation of the relationships between different molecules in a reaction is the definition of __________________.
physics
algebra
stoichiometry
language arts
Before you begin any stoichiometry problem, you must always start with this.
A periodic table.
A calculator.
A balanced chemical equation.
All of the above are helpful.
The hardest part of chemistry this year was:
States of matter
Labs
Balancing equations
Atomic Theory
Stoichiometry
When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced
charge
subscript
random number
coefficient
Balance the chemical equation.
1
2
3
4
5
6
7
8
9
10
Balance the equation.
(a) NaCl → (b) Na + Cl₂
2
1
3
4
(a) Cr2O3 --> (b) Cr + (c) O2
2
4
3
1
5
6
8
7
Balance the Equation.
(a) P4 + (b) O2 --> (c) P2O3
1
3
2
4
Balance the equation:
6
5
4
1
2
3
Balance the equation. The options can be used more than once.
(a) K + Cl₂ → (b) KCl
2
3
4
1
Balance this equation:
(a) FeCl2 + (b) Cl2 --> (c) FeCl3
2
1
3
4
What coefficient should be used to make the following equation balanced?
N2+O2--> _NO
1
2
3
4
Balance this equation:
__Li + __Cl2 -> __LiCl
2Li + Cl2 -> 4LiCl2
2Li + Cl2 -> LiCl2
2Li + Cl2 -> 2LiCl
Which of the following equations is balanced?
P4 + 3O2 ---> 2P2O3
N4 + 3F2 ---> 2NF3
2LiF + Br2 ---> 2LiBr + F4
identify the correct coefficients to balance this chemical reaction:
__H2O2 --> __H2O + __O2
already balanced
2,1,1
2,2,1
2,1,2
identify the correct coefficients to balance this chemical reaction:
__Na + __Cl2 --> __NaCl
1,1,2
2,1,2
2,1,1
already balanced
What cacn you ONLY change to balance chemical reactions?
Subscripts
Superscripts
Coefficients
Balance the following reaction by including the missing coefficients:
__ Li3N + ___ NH4NO3 → ___ LiNO3 + ___(NH4)3N
(a)
Balance this equation
_Zn+_HCl-->_ZnCl2 +_H2
1,1,2,1
1,1,1,2
1,2,1,1
2,1,1,1
Balance this equation:
P4+O2 --> P2O3
3 P4+ O2 --> 2 P2O3
P4+ O2 --> 2 P2O3
P4+ 3 O2 --> 2 P2O3
P4+ 2 O2 --> 3 P2O3
When balancing chemical equations, what is the primary purpose of using coefficients?
To change the chemical identity of the reactants
To ensure the law of conservation of mass is followed
To increase the reaction rate
To alter the physical state of the substances
Balance the following equation: @@ ext{__} ext{C}_2 ext{H}_6 + ext{__} ext{O}_2 ightarrow ext{__} ext{CO}_2 + ext{__} ext{H}_2 ext{O}@@
1, 3.5, 2, 3
2, 7, 4, 6
1, 2, 1, 2
2, 5, 4, 6
Which of the following is a balanced chemical equation?
@@ ext{H}_2 + ext{O}_2 ightarrow ext{H}_2 ext{O}@@
@@ ext{2H}_2 + ext{O}_2 ightarrow ext{2H}_2 ext{O}@@
@@ ext{H}_2 + ext{2O}_2 ightarrow ext{H}_2 ext{O}_2@@
@@ ext{2H}_2 + ext{2O}_2 ightarrow ext{2H}_2 ext{O}_2@@
In a chemical reaction, which of the following can be changed to balance the equation?
The subscripts in the chemical formulas
The coefficients in front of the chemical formulas
The chemical symbols of the elements
The physical states of the reactants
Balance the following chemical equation: @@ ext{__} ext{Al} + ext{__} ext{O}_2 ightarrow ext{__} ext{Al}_2 ext{O}_3@@
4, 3, 2
2, 3, 1
1, 1.5, 1
2, 1.5, 1
