Law of Conservation of Mass

What happens to the mass of a substance when it undergoes a chemical reaction?

• The mass increases due to the formation of new substances.

• The mass decreases as energy is released.

• The mass remains constant.

• The mass fluctuates depending on the temperature.

What is the Law of Conservation of Mass?

• Mass is never created or destroyed in a chemical reaction.

• Mass can be created but not destroyed in a chemical reaction.

• Mass can be destroyed but not created in a chemical reaction.

• Mass is only conserved in physical changes, not chemical reactions.

What is an example of a physical change?

• Ice melting into water.

• Burning wood to ash.

• Rust forming on iron.

• Baking a cake.

What is the relationship between reactants and products in terms of mass?

• The mass of reactants is greater than the mass of products.

• The mass of reactants equals the mass of products.

• The mass of products is greater than the mass of reactants.

• The mass of reactants and products is irrelevant.

How does the Law of Conservation of Mass apply to everyday life?

• It explains why we can’t create or destroy matter in cooking or chemical processes.

• It allows us to create new elements in a laboratory.

• It states that mass can be lost during a chemical reaction.

• It explains why food can be transformed into energy.

Can mass be created or destroyed in a closed system?

• Yes, mass can be created.

• Yes, mass can be destroyed.

• No, mass cannot be created or destroyed.

• Mass can be transformed but not created or destroyed.

What is a common misconception about the Law of Conservation of Mass?

• That mass can be lost or gained during a reaction.

• That mass remains constant in all reactions.

• That mass can be created from nothing.

• That mass can be transformed into energy.

Does the mass change during a physical change, like ice melting into water?

• Yes, the mass increases.

• Yes, the mass decreases.

• No, the mass stays the same.

• No, the mass doubles.

Is it true that during a chemical reaction, some mass can be lost?

• True, mass can be lost during a chemical reaction.

• False, mass is conserved.

• True, mass is created during a chemical reaction.

• False, mass is destroyed.

What is the significance of the Law of Conservation of Mass in chemical reactions?

• It ensures that the total mass of reactants equals the total mass of products.

• It states that mass can be created or destroyed in a chemical reaction.

• It implies that the number of atoms in reactants is different from that in products.

• It indicates that energy is conserved in chemical reactions.