SPS3. Conservation of Mass and Balancing Equations

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 reactants equals the total mass of products.

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, ensuring that mass is conserved.

Front

What are reactants in a chemical reaction?

Back

Reactants are the starting substances in a chemical reaction that undergo change to form products.

Front

What are products in a chemical reaction?

Back

Products are the substances formed as a result of a chemical reaction.

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, adjust the coefficients in front of the compounds to ensure the same number of each type of atom 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 and are used to balance the equation.

Front

What is the role of oxygen in combustion reactions?

Back

Oxygen acts as an oxidizing agent in combustion reactions, allowing substances like hydrocarbons to react and release energy.

Front

What is the formula for the combustion of methane?

Back

The balanced equation for the combustion of methane is CH₄ + 2O₂ → CO₂ + 2H₂O.

Front

How many atoms are in the product of the reaction 2Mg + O₂ → 2MgO?

Back

There are 4 atoms in the product side (2 magnesium atoms and 2 oxygen atoms).

Front

If 4 grams of reactant are used, how many grams of product are produced?

Back

According to the Law of Conservation of Mass, if 4 grams of reactant are used, 4 grams of product will be produced.