Chemical Reactions and Conservation of Mass

What does the text suggest about the ingredients of a cake after baking?

• They remain the same.

• They disappear.

• They are very different from the finished product.

• They are destroyed.

What does a chemical equation use to describe what happens in a chemical reaction?

• Words and sentences

• Chemical symbols and numbers

• Pictures and diagrams

• Colors and shapes

What is the product formed when iron reacts with oxygen in the given chemical equation?

• FeO

• FeO2

• Fe2O3

• Fe3O4

What is the atomic number of iron as shown in the periodic table?

• 8

• 16

• 26

• 32

What happens to atoms during a chemical reaction according to the Law of Conservation of Mass?

• They are created.

• They are destroyed.

• They are rearranged.

• They disappear.

What is the total mass of water used in the photosynthesis process as shown in the diagram?

• 108 g

• 180 g

• 192 g

• 264 g

In the context of photosynthesis, what does the term "balanced chemical equation" imply?

• The equation has more reactants than products

• The equation has more products than reactants

• The number of atoms for each element is the same on both sides

• The equation is only theoretical and not practical

What is the significance of the balanced chemical equation in photosynthesis?

• It shows that energy is lost during the reaction

• It demonstrates the conservation of mass

• It indicates that more reactants are needed than products

• It proves that photosynthesis is an inefficient process

What is the role of water in the photosynthesis equation?

• It is a product.

• It is a reactant.

• It is a catalyst.

• It is an inhibitor.

What happens to the total mass during the photosynthesis reaction?

• It increases.

• It decreases.

• It remains the same.

• It fluctuates.