Balancing Chemical Equations Worksheet
A Grade 10 science worksheet focused on balancing various chemical equations, including multiple choice, fill-in-the-blanks, and short answer questions.
Includes
Standards
Topics
Balancing Chemical Equations
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Read each question carefully and provide the best answer. For balancing equations, ensure that the number of atoms for each element is equal on both sides of the equation.
1. Which of the following best describes a balanced chemical equation?
The number of molecules on both sides of the equation is equal.
The total mass of reactants equals the total mass of products.
The number of atoms of each element on both sides of the equation is equal.
The coefficients on both sides of the equation are equal.
2. What principle is upheld by balancing chemical equations?
Law of Definite Proportions
Law of Conservation of Energy
Law of Conservation of Mass
Law of Multiple Proportions
3. In a chemical equation, the substances on the left side of the arrow are called , and the substances on the right side are called .
4. Coefficients are numbers placed in front of chemical formulas to the equation.
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 'yields' or 'produces'.
True
False
9. Explain why it is necessary to balance chemical equations.