Balancing chemical reactions

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both the reactant and product sides, following the law of conservation of mass.

Front

Why is it important to balance chemical reactions?

Back

It is important to balance chemical reactions because it follows the law of conservation of mass, ensuring that matter is neither created nor destroyed in a chemical reaction.

Front

What does the law of conservation of mass state?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

How do you determine if a chemical equation is balanced?

Back

Count the number of atoms of each element on both sides of the equation. If they are equal, the equation is balanced.

Front

What is a reactant in a chemical reaction?

Back

A reactant is a substance that undergoes change during a chemical reaction.

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What is a product in a chemical reaction?

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A product is a substance that is formed as a result of a chemical reaction.

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What is the role of coefficients in a chemical equation?

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Coefficients are numbers placed in front of compounds in a chemical equation to indicate how many molecules or moles of that substance are involved.

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What does it mean to 'balance' a chemical equation?

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To balance a chemical equation means to adjust the coefficients so that the number of atoms of each element is the same on both sides of the equation.

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What happens if a chemical equation is not balanced?

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If a chemical equation is not balanced, it does not accurately represent the reaction and violates the law of conservation of mass.

Front

How many hydrogen atoms are in the equation 2H2 + O2 -> 2H2O?

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There are 4 hydrogen atoms in the products side of the equation.