Balance chemical equations

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved during a chemical reaction.

Front

What are reactants in a chemical equation?

Back

Reactants are the substances that undergo a chemical change in a reaction, found on the left side of a chemical equation.

Front

What are products in a chemical equation?

Back

Products are the substances formed as a result of a chemical reaction, found on the right side of a chemical equation.

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What do coefficients in a chemical equation represent?

Back

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

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What do subscripts in a chemical formula indicate?

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Subscripts are the small numbers in a chemical formula that indicate the number of atoms of each element in a molecule.

Front

How do you determine if a chemical equation is balanced?

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To determine if a chemical equation is balanced, count the number of atoms of each element on both sides of the equation and ensure they are equal.

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What is the law of conservation of mass?

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The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction; it can only change forms.

Front

What is the significance of the arrow in a chemical equation?

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The arrow in a chemical equation indicates the direction of the reaction, showing that reactants are transformed into products.

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How many oxygen atoms are in 4Ca(OH)2?

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There are 8 oxygen atoms in 4Ca(OH)2.

Front

How many aluminum atoms are in the equation 4Al + 3O2 --> 2Al2O3?

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There are 4 aluminum atoms in the equation.