Balancing 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.

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What is the law of conservation of mass?

Back

The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

Front

How do you determine the mass of products in a chemical reaction?

Back

To determine the mass of products, add the masses of all reactants. The total mass before the reaction equals the total mass after the reaction.

Front

What is the first step in balancing a chemical equation?

Back

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

Front

What does it mean to balance an equation?

Back

Balancing an equation means adjusting the coefficients in front of compounds to ensure that the number of atoms for each element is the same on both sides.

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What is a coefficient in a chemical equation?

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A coefficient is a number placed in front of a chemical formula in an equation to indicate how many molecules or moles of that substance are involved.

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How do you balance the equation: H2 + O2 -> H2O?

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The balanced equation is 2H2 + O2 -> 2H2O, meaning 2 molecules of hydrogen react with 1 molecule of oxygen to produce 2 molecules of water.

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

Back

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

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What is the significance of balancing chemical equations?

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Balancing chemical equations is crucial because it reflects the conservation of mass and allows chemists to predict the amounts of products formed.

Front

What is the balanced equation for the reaction of iron and oxygen to form iron(III) oxide?

Back

The balanced equation is 4Fe + 3O2 -> 2Fe2O3.