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Balance Chemical Equation Quiz

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Questions and Answers

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?

$H_2 + O_2 \rightarrow H_2O$

$2H_2 + O_2 \rightarrow 2H_2O$ (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?

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?

<p>A chemical reaction</p> Signup and view all the answers

What is the purpose of adjusting coefficients in a chemical equation?

<p>To get the same number of each type of atom on both sides of the equation</p> Signup and view all the answers

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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Description

Learn to balance chemical equations with this online balancer tool and instructional guide. Practice with examples of complete chemical equations and their reagents to understand chemical reactions better.