Law of Conservation of Mass

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that in a closed system, the total mass of reactants before a chemical reaction is equal to the total mass of products after the reaction.

Front

How many Sulfur atoms are present in the reactants of the equation: 2SO₂ + 2H₂O₂ → 2H₂SO₄?

Back

2 Sulfur atoms.

Front

If Bob puts 200 grams of ice into a pitcher with 900 grams of water, how many grams of water does he have after the ice melts?

Back

1,100 grams of water.

Front

What will weigh more when a chemical change is complete? The reactants or the products?

Back

They both will weigh the same.

Front

What is a precipitate?

Back

A precipitate is a solid that forms when two liquids are mixed.

Front

What does the mass of a chemical reaction remain as per the Law of Conservation of Mass?

Back

The mass of a chemical reaction remains constant.

Front

What happens to the total mass in a chemical reaction?

Back

The total mass remains unchanged; it is conserved.

Front

Can mass be created or destroyed in a chemical reaction?

Back

No, mass cannot be created or destroyed; it can only change forms.

Front

What is an example of a chemical reaction where the Law of Conservation of Mass applies?

Back

Burning wood: the mass of the wood and oxygen used equals the mass of the ash, gases, and heat produced.

Front

What is the significance of balancing chemical equations?

Back

Balancing chemical equations ensures that the Law of Conservation of Mass is upheld, showing that mass is conserved.