Balancing Chemical Equations

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has an equal number of atoms for each element on both sides of the equation.

Tags

NGSS.MS-PS1-5

Front

What does it mean if a chemical equation is unbalanced?

Back

An unbalanced chemical equation has a different number of atoms for at least one element on each side of the equation.

Tags

NGSS.MS-PS1-5

Front

How can you determine if a chemical equation is balanced?

Back

Count the number of atoms of each element on both sides of the equation and compare them.

Tags

NGSS.MS-PS1-5

Front

What is the law of conservation of mass in relation to chemical equations?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction, so the number of atoms must remain constant.

Tags

NGSS.MS-PS1-5

Front

What are coefficients in a chemical equation?

Back

Coefficients are the numbers placed in front of compounds in a chemical equation to indicate the number of molecules or moles of that substance.

Front

How do you balance a chemical equation?

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To balance a chemical equation, adjust the coefficients of the reactants and products until the number of atoms of each element is equal on both sides.

Tags

NGSS.MS-PS1-5

Front

What is the balanced equation for the combustion of methane (CH4)?

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The balanced equation is CH4 + 2O2 -> CO2 + 2H2O.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the significance of the coefficients 2, 4, 3 in the equation Fe2O3 -> Fe + O2?

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These coefficients indicate that 2 moles of Fe2O3 produce 4 moles of Fe and 3 moles of O2, balancing the equation.

Tags

NGSS.MS-PS1-5

Front

What is the balanced equation for the reaction of phosphorus (P4) with oxygen (O2)?

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The balanced equation is P4 + 3O2 -> 2P2O3.

Tags

NGSS.MS-PS1-5

Front

What is the first step in balancing a chemical equation?

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The first step is to write down the unbalanced equation and count the number of atoms of each element.