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WorksheetsBalancing Equations
Total questions: 18
Worksheet time: 40mins
How many HCl molecules do you need to balance this equation?
2Mg + (a) HCl ---> 2MgCl2 + 2H2
What coefficient should be used to make the following equation balanced?
N2+O2--> __?__NO
1
2
3
4
Drag and drop the coefficients that balance this equation 2 Fe + (a) Cl2 ----> (b) FeCl3
Balance this equation (a) N2 + (b) H2 --> (c) NH3
Balance this equation. _CF4 + _Br2 → _CBr4 + _F2
3,1,2,1
1,2,1,2
2,2,2,2
According to the Law of Conservation of Mass (Matter), Matter cannot be (a) or (b) , it can only be (c) . This means however many atoms of an element we have before a reaction must be (d) to the number after a reaction.
Example: H2
Coefficient
Subscript
Atom
Equation
12CO2 +H2O --> C6H12O6 + O2
CO2 + 9H2O --> C6H12O6 + O2
CO2 + H2O --> 3C6H12O6 + O2
6CO2 + 6H2O --> C6H12O6 + 6O2
In 3P2O5, there are (a) phosphorus (P) atoms and (b) oxygen (O) atoms.
What's unbalanced about this equation?
Al + O2 --> Al2O3
Oxygen (O) only
Aluminum (Al) only
Both oxygen and aluminum
Nothing; it is balanced.
What is wrong with how this student balanced the equation?
Original equation: Ag + O2 ---> Ag2O
Solution: Ag + O2 ---> 2Ag2O
They changed the molecular structure of the products/reactants.
The silver (Ag) still isn't balanced.
The oxygen (O) still isn't balanced.
They left out the reactants.
Balance this equation:
(a) Fe + (b) O2 --> (c) Fe2O3
Fe + S --> FeS
Example: H2
Al + O2 → 2Al2O3
