Law of Conservation of Mass/Energy

Front

What does the Law of Conservation of Mass state?

Back

Matter cannot be created or destroyed in a chemical reaction; it can only be transformed.

Tags

NGSS.MS-PS1-5

Front

What happens to the total mass of reactants in a chemical reaction?

Back

The total mass of the reactants equals the total mass of the products.

Tags

NGSS.MS-PS1-5

Front

If you start with 50 grams of reactants, what will be the mass of the products?

Back

The mass of the products will also be 50 grams.

Tags

NGSS.MS-PS1-5

Front

What is the relationship between reactants and products in terms of mass?

Back

The mass of reactants before a reaction is equal to the mass of products after the reaction.

Tags

NGSS.MS-PS1-5

Front

Can energy be created or destroyed according to the Law of Conservation of Energy?

Back

No, energy cannot be created or destroyed; it can only be transformed from one form to another.

Tags

NGSS.MS-PS3-5

Front

What is an example of a transformation of energy?

Back

Chemical energy in food is transformed into kinetic energy when we move.

Tags

NGSS.MS-PS1-6

Front

What is the significance of balancing chemical equations?

Back

Balancing chemical equations ensures that the mass of reactants equals the mass of products, adhering to the Law of Conservation of Mass.

Tags

NGSS.MS-PS1-5

Front

What is the formula for calculating the mass of water produced from hydrogen and oxygen?

Back

The mass of water produced equals the mass of hydrogen plus the mass of oxygen used in the reaction.

Tags

NGSS.MS-PS1-5

Front

In a closed system, what happens to the total mass during a chemical reaction?

Back

The total mass remains constant throughout the reaction.

Tags

NGSS.MS-PS1-5

Front

What is an example of a chemical reaction that demonstrates the Law of Conservation of Mass?

Back

The combustion of methane: CH4 + 2O2 → CO2 + 2H2O, where the total mass of reactants equals the total mass of products.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5