Law of Conservation of Mass

Front

What is the Law of Conservation of Mass?

Back

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

Front

What does a balanced chemical equation represent?

Back

A balanced chemical equation represents a chemical reaction where the number of atoms for each element is the same on both sides of the equation, indicating that mass is conserved.

Front

How do you determine if a chemical equation is balanced?

Back

To determine if a chemical equation is balanced, count the number of atoms of each element on both sides of the equation. If they are equal, the equation is balanced.

Front

What happens to the mass of reactants during a chemical reaction?

Back

The mass of the reactants remains constant and is equal to the mass of the products formed in the reaction.

Front

What is the product of heating calcium carbonate (CaCO₃)?

Back

When calcium carbonate (CaCO₃) is heated, it decomposes into calcium oxide (CaO) and carbon dioxide (CO₂).

Front

If 100 g of CaCO₃ is heated, what is the mass of the products formed?

Back

The sum of the products’ masses equals the mass of the CaCO₃, which is 100 g.

Front

How many oxygen atoms are in the chemical formula C₆H₁₂O₆?

Back

There are 6 oxygen atoms in the chemical formula C₆H₁₂O₆.

Front

What is a reactant in a chemical reaction?

Back

A reactant is a substance that undergoes change during a chemical reaction, appearing on the left side of a chemical equation.

Front

What is a product in a chemical reaction?

Back

A product is a substance that is formed as a result of a chemical reaction, appearing on the right side of a chemical equation.

Front

What is the significance of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of a substance involved in a reaction and are used to balance the equation.