PS.3D Modeling Conservation of Mass

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 reactant?

Back

A reactant is a substance that undergoes a chemical change in a reaction.

Front

What is a product?

Back

A product is a substance produced during a chemical reaction.

Front

How many hydrogen atoms are in the product of the reaction: 2SO2 + 2H2O2 -> 2H2SO4?

Back

There are 4 hydrogen atoms in the product.

Front

If 200 g of water freezes, what will be the mass of the frozen water?

Back

The mass of the frozen water will be 200 g.

Front

What is the chemical formula for sodium chloride?

Back

The chemical formula for sodium chloride is NaCl.

Front

What happens to the mass of substances during a chemical reaction?

Back

The mass of substances remains constant; it is conserved.

Front

What is the role of oxygen in a chemical reaction?

Back

Oxygen can act as a reactant in combustion and oxidation reactions.

Front

How do you calculate the total mass of products in a reaction?

Back

Add the masses of all reactants; this total equals the total mass of products.

Front

What is the significance of balancing a chemical equation?

Back

Balancing a chemical equation ensures that the law of conservation of mass is upheld.