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WorksheetsChemical Equations and Balancing
Total questions: 25
Worksheet time: 25mins
Is this equation balanced?
SO3 + H2O --> H2SO4
yes
no
Is this equation balanced?
Mg2 + HCl ---> MgCl2 + H2
Yes
No
The coefficient in 3H2O is
6
5
2
3
What is the left part of a chemical equation called?
Reactants
Yields
Products
Chemical equation
To balance an equation you should:
ONLY change subscripts.
ONLY change coefficients.
Change BOTH subscripts and coefficients.
What is the right part of a chemical equation called?
2H2 + O2 ---> 2H2O
Reactants
Yields
Products
Chemical Equation
What is the little number after an element in a chemical equation called?
Coefficient
Atom
Subscript
Equation
What is the number before a chemical formula called?
Example: 2H2 + O2 ---> 2H2O
Coefficient
Atom
Subscript
Equation
In the equation, 2Mg + O2 ---> 2MgO, which are the REACTANTS?
Mg and O
Mg and MgO
MgO
O and MgO
This is used to represent the amount of each atom in a molecule. What is the arrow pointing to?
Exponent
Coefficient
Molecule
Subscript
What is the arrow in a chemical equation called?
2H2 + O2 ---> 2H2O
Reactant
Product
Yields
What is the part of the chemical equation in green called?
Fe + S --> FeS
products
reactants
yield
chemical formula
Is this balanced?
Al + O2 → 2Al2O3
Yes
No
Is this equation balanced?
N2 + O2 --> N2O2
No
Yes
How many Sodium (Na) are in 3NaCl?
1
3
6
Is the following equation balanced?...
Al + O2 --> 2Al2O3
Yes!
No!
Is the following equation balanced?
2C2H2 + 5O2 --> 4CO2 + 2H2O
yes
no
Which of the following equations are correctly balanced?
12CO2 +H2O --> C6H12O6 + O2
CO2 + 9H2O --> C6H12O6 + O2
CO2 + H2O --> 3C6H12O6 + O2
6CO2 + 6H2O --> C6H12O6 + 6O2
Balance the following equation:
___ H2+ ___ O2→___ H2O
1, 1, 3
2, 2, 2
1, 2, 1
2,1, 2
Balance the following equation:
___ Mg+ ___ O2→___ MgO
1, 1, 3
2, 1, 2
1, 2, 1
2, 2, 2
Which of the following chemical equations is balanced?
@@ ext{C}_3 ext{H}_8 + 5 ext{O}_2 ightarrow 3 ext{CO}_2 + 4 ext{H}_2 ext{O}@@
@@ ext{C}_3 ext{H}_8 + 4 ext{O}_2 ightarrow 3 ext{CO}_2 + 4 ext{H}_2 ext{O}@@
@@ ext{C}_3 ext{H}_8 + 6 ext{O}_2 ightarrow 3 ext{CO}_2 + 4 ext{H}_2 ext{O}@@
@@ ext{C}_3 ext{H}_8 + 5 ext{O}_2 ightarrow 4 ext{CO}_2 + 4 ext{H}_2 ext{O}@@
What is the coefficient of O2 in the balanced equation for the combustion of methane: @@ ext{CH}_4 + ext{O}_2 ightarrow ext{CO}_2 + ext{H}_2 ext{O}@@?
1
2
3
4
In the chemical equation @@ ext{2H}_2 + ext{O}_2 ightarrow ext{2H}_2 ext{O} ,whatistheroleof ext{O}_2@@?
Reactant
Product
Catalyst
Inhibitor
Which of the following is a balanced chemical equation for the reaction of hydrogen and oxygen to form water?
@@ ext{H}_2 + ext{O}_2 ightarrow ext{H}_2 ext{O}@@
@@2 ext{H}_2 + ext{O}_2 ightarrow 2 ext{H}_2 ext{O}@@
@@ ext{H}_2 + ext{O}_2 ightarrow 2 ext{H}_2 ext{O}@@
@@2 ext{H}_2 + 2 ext{O}_2 ightarrow 2 ext{H}_2 ext{O}@@
If the equation @@ ext{Fe}_2 ext{O}_3 + ext{C} ightarrow ext{Fe} + ext{CO}_2 isbalanced,whatisthecoefficientof ext{C}@@?
1
2
3
4
