Law of Conservation of Mass Day 2

Multiple Choice

Which statement correctly compares the number of atoms in the reactant and in the products?

• The number of atoms in each molecule of liquid water is equal to the number of atoms in each molecule of oxygen gas.

• The number of atoms in each molecule of hydrogen peroxide is equal to the number of atoms in each molecule of oxygen gas.

• The total number of atoms in the hydrogen peroxide molecules is equal to the total number of atoms in the liquid water and oxygen gas molecules.

• The total number of atoms in the hydrogen peroxide molecules is equal to the total number of atoms in each molecule of liquid water.

Open Ended

Why is the Law of Conservation of Mass important when analyzing chemical equations?

Multiple Choice

Which law states that matter is neither created nor destroyed, but only rearranged during a chemical reaction?

• Law of Conservation of Mass

• Law of Definite Proportions

• Law of Multiple Proportions

• Law of Constant Composition

Labelling

Label each part of the chemical equation

Drag labels to their correct position on the image

Products

Reactants

Coefficient

Subscript

Open Ended

Describe a real-life scenario where the law of conservation of mass can be observed outside of a laboratory setting.

Open Ended

Explain how the law of conservation of mass is demonstrated in the process of photosynthesis using the chemical equation.

Multiple Select

Which of the following are reactants in the photosynthesis equation?

• Carbon dioxide

• Water

• Glucose

• Oxygen

Multiple Choice

How many grams of sulfuric acid (H2SO4) were used in the reaction if 74 g of Ca(OH)2 reacts to produce 136 g of CaSO4 and 36 g of H2O?

• 62 g

• 98 g

• 36 g

• 100 g

Open Ended

Reflecting on today's lesson about the Law of Conservation of Mass, what is one question you still have or one thing you would like to know more about?