Conservation of Mass

Front

What does the Law of Conservation of Mass state?

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

How does heating a gas in a balloon affect its mass?

Back

Heating a gas in a balloon causes the gas to expand, but the mass of the gas remains the same.

Front

If you start with 50g of reactants, what is the expected mass of the products?

Back

The expected mass of the products will also be 50g, according to the Law of Conservation of Mass.

Front

What happens to the mass of an object when it undergoes a physical change, such as melting?

Back

The mass of the object remains the same during a physical change, such as melting.

Front

In a chemical reaction, if 30g of reactants produce 25g of products, how much mass is lost?

Back

5g of mass is lost, which is the mass of the reactants that did not convert into products.

Front

What is an example of a physical change that does not affect mass?

Back

Melting ice is an example of a physical change that does not affect mass; the mass remains the same before and after melting.

Front

How can you determine the mass of gas produced in a reaction?

Back

You can determine the mass of gas produced by subtracting the mass of the products from the mass of the reactants.

Front

What is the mass of a substance if it is heated and changes state, such as from solid to liquid?

Back

The mass of the substance remains unchanged when it changes state, such as from solid to liquid.

Front

Why is it important to consider mass in chemical reactions?

Back

It is important to consider mass in chemical reactions to ensure that the reaction adheres to the Law of Conservation of Mass, which helps in predicting the amounts of products formed.

Front

What is the mass of a 10g object after it is cut in half?

Back

The mass of the object remains 10g; each half will weigh 5g, but the total mass is unchanged.