Chemical Equations

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products involved.

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 the 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 the equation.

Front

What does it mean to balance a chemical equation?

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Balancing a chemical equation means ensuring that the number of atoms for each element is the same on both sides of the equation.

Front

What is the law of conservation of mass?

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

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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 determine the number of atoms in a molecule?

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To determine the number of atoms in a molecule, add the subscripts of each element in the chemical formula.

Front

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

Back

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

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How many hydrogen atoms are in C6H12O6?

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There are 12 hydrogen atoms in C6H12O6.

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.