SPS3. Conservation of Mass and Balancing Equations

Front

What does the '3' in front of O₂ stand for in the equation 4 Al + 3O₂ → 2Al₂O₃?

Back

It indicates that there are 3 separate oxygen molecules in the reaction.

Front

Balance the equation: __P₄ + __O₂ → __P₂O₃

Back

1, 3, 2

Front

What does the Law of Conservation of Matter state?

Back

Mass is conserved during a chemical reaction.

Front

When CaCO₃ is heated, what happens to the mass of the products compared to the mass of the reactants?

Back

The sum of the products’ masses equals the mass of the CaCO₃.

Front

Based on the Law of Conservation of Matter, describe the relationship between the mass of the reactants and the mass of the products.

Back

The mass of the reactants equals the mass of the products.

Front

What is the Law of Conservation of Mass?

Back

Mass cannot be created or destroyed in a chemical reaction.

Front

What are reactants in a chemical equation?

Back

Substances that undergo a chemical change during a reaction.

Front

What are products in a chemical equation?

Back

Substances that are formed as a result of a chemical reaction.

Front

What does it mean to balance a chemical equation?

Back

To ensure that the number of atoms for each element is the same on both sides of the equation.

Front

What is a coefficient in a chemical equation?

Back

A number placed in front of a chemical formula to indicate how many molecules are involved.