Balancing Equations Practice

Front

What is the Law of Conservation of Mass?

Back

Matter cannot be gained or lost in a chemical reaction.

Front

How many atoms of aluminum are in the equation: 4Al + 3O₂ → 2Al₂O₃?

Back

4

Front

What is the coefficient in the chemical formula 3H₂O?

Back

3

Front

Is the equation Mg + Cl₂ → MgCl₂ balanced?

Back

Yes, it is already balanced.

Front

Balance the equation: P₄ + O₂ → P₂O₃. What are the coefficients?

Back

1, 3, 2

Front

What does a coefficient in a chemical equation represent?

Back

The number of molecules or atoms of a substance involved in the reaction.

Front

What is a balanced chemical equation?

Back

An equation where the number of atoms for each element is the same on both sides.

Front

Why is balancing equations important in chemistry?

Back

It reflects the Law of Conservation of Mass and ensures accurate stoichiometric calculations.

Front

What is the first step in balancing a chemical equation?

Back

Count the number of atoms of each element on both sides.

Front

What does it mean if an equation is already balanced?

Back

The number of atoms for each element is equal on both sides of the equation.