Writing and Balancing Equations

Front

What is a balanced equation?

Back

A balanced 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.

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. If they are equal, the equation is balanced.

Front

What does the coefficient in a chemical equation represent?

Back

The coefficient indicates the number of molecules or moles of a substance involved in the reaction.

Front

What is the law of conservation of mass?

Back

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

Front

How many oxygen atoms are in the compound (OH)₂?

Back

There are 2 oxygen atoms in the compound (OH)₂.

Front

What is a word equation?

Back

A word equation is a way of representing a chemical reaction using the names of the reactants and products.

Front

Write the chemical equation for the reaction: Solid iron + solid sulfur → solid iron (II) sulfide.

Back

Fe(s) + S(s) → FeS(s)