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Questions and Answers
What does a balanced chemical equation obey?
What does a balanced chemical equation obey?
- The Law of Definite Proportions
- The Law of Constant Composition
- The Law of Conservation of Mass (correct)
- The Law of Multiple Proportions
In the reaction of hydrogen with oxygen to form water, what is the balanced chemical equation?
In the reaction of hydrogen with oxygen to form water, what is the balanced chemical equation?
- $H_2 + O_2 \rightarrow H_2O$
- $2H_2 + O_2 \rightarrow 2H_2O$ (correct)
- $4H_2 + 2O_2 \rightarrow 4H_2O$
- $H_2 + 2O_2 \rightarrow H_2O$
Which method is best for balancing simple equations with a small number of atoms?
Which method is best for balancing simple equations with a small number of atoms?
- Balancing with substitution method
- Balancing with matrix method
- Balancing with inspection or trial and error method (correct)
- Balancing with algebraic method
What does a balanced chemical equation represent?
What does a balanced chemical equation represent?
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What is the purpose of adjusting coefficients in a chemical equation?
What is the purpose of adjusting coefficients in a chemical equation?
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Study Notes
Balanced Chemical Equation
- A balanced chemical equation obeys the Law of Conservation of Mass, which states that matter cannot be created or destroyed in a chemical reaction.
- The balanced chemical equation for the reaction of hydrogen with oxygen to form water is 2H2 + O2 → 2H2O.
Balancing Chemical Equations
- The simplest method for balancing simple equations with a small number of atoms is by trial and error.
- A balanced chemical equation represents the exact quantities of reactants and products in a chemical reaction.
- The purpose of adjusting coefficients in a chemical equation is to ensure that the number of atoms of each element is the same on both the reactant and product sides.
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