Balancing 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 starting substances that undergo a chemical change in a reaction.

Front

What are products in a chemical equation?

Back

Products are the substances formed as a result of a chemical reaction.

Front

What is a coefficient in a chemical equation?

Back

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

Front

What is a subscript in a chemical formula?

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A subscript is a small number written after an element symbol that indicates the number of atoms of that element in a molecule.

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 of each element is the same on both sides of the equation.

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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 is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

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How do you determine the total number of atoms in a compound?

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To determine the total number of atoms in a compound, multiply the number of atoms of each element by its subscript and sum them up.

Front

What is the total number of atoms in 5Na₃PO₄?

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40 (5 x (3 Na + 1 P + 4 O) = 40).

Front

How many hydrogen atoms are in 3(NH₄)₂CrO₄?

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24 (3 x 2 x 4 = 24).