Chemical Reactions

Front

What is a chemical reaction?

Back

A process in which substances (reactants) are transformed into different substances (products) through the breaking and forming of chemical bonds.

Front

What are reactants in a chemical equation?

Back

The substances that undergo a chemical change, found on the left side of a chemical equation.

Front

What are products in a chemical equation?

Back

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

Front

What does it mean for a chemical equation to be balanced?

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.

Front

How do 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.

Front

What is the law of conservation of mass?

Back

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

Front

What is a coefficient in a chemical equation?

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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 number written below and to the right of a chemical symbol that indicates the number of atoms of that element in a molecule.

Front

What is the difference between a balanced and unbalanced equation?

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A balanced equation has equal numbers of each type of atom on both sides, while an unbalanced equation does not.

Front

What is an example of a balanced chemical equation?

Back

@@2H_2 + O_2 ightarrow 2H_2O@@ is balanced because there are 4 hydrogen atoms and 2 oxygen atoms on both sides.