Conservation of Mass Review

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

How do you determine if a chemical equation is balanced?

Back

A chemical equation is balanced when the number of atoms of each element is the same on both sides of the equation.

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 the 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 the equation.

Front

What does it mean to balance a chemical equation?

Back

Balancing a chemical equation means adjusting the coefficients in front of the reactants and products to ensure that the same number of each type of atom appears on both sides.

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 the reaction, helping to balance the equation.

Front

How many oxygen atoms are in the products of the reaction @@4Fe + 3O_{2} ightarrow 2Fe_2O_3@@?

Back

There are 6 oxygen atoms in the products.

Front

If a solid weighing 25 g is mixed with 60 g of a solution and the final mass is 75 g, what is the mass of the gas released?

Back

The mass of the gas released is 10 g.

Front

What is the balanced equation for the reaction of zinc and hydrochloric acid?

Back

The balanced equation is @@Zn + 2HCl ightarrow ZnCl_2 + H_2@@.

Front

Is the equation @@2Na + 2H_2O ightarrow 2NaOH + H_2@@ balanced?

Back

Yes, the equation is balanced.