Balancing Chemical Equations Worksheet
Grade 9 Science worksheet on balancing chemical equations, covering basic principles and practice problems.
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Topics
Balancing Chemical Equations
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Read each question carefully and balance the chemical equations provided. Show all your work for full credit.
1. What principle states that matter cannot be created or destroyed in a chemical reaction?
Law of Conservation of Energy
Law of Conservation of Mass
Law of Definite Proportions
Law of Multiple Proportions
2. In a balanced chemical equation, the number of atoms of each element on the reactant side must be the number of atoms of each element on the product side.
less than
greater than
equal to
half of
3. The numbers placed in front of chemical formulas to balance an equation are called .
4. Subscripts in a chemical formula represent the number of of each element in a compound.
5. Balance the following chemical equation:
N₂ + H₂ → NH₃
6. Balance the following chemical equation:
CH₄ + O₂ → CO₂ + H₂O
7. You can change the subscripts in a chemical formula to balance an equation.
True
False
8. The arrow in a chemical equation means 'produces' or 'yields'.
True
False
9. Balance the following chemical equation:
Fe + O₂ → Fe₂O₃
10. Balance the following chemical equation:
Al + HCl → AlCl₃ + H₂