Law of 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.

Tags

NGSS.MS-PS1-5

Front

How can you determine if a chemical equation follows the Law of Conservation of Mass?

Back

To determine if a chemical equation follows the Law of Conservation of Mass, count the number of atoms of each element on both sides of the equation. They must be equal.

Tags

NGSS.MS-PS1-5

Front

In the reaction 3 H₂ + N₂ → 2 NH₃, does it follow the Law of Conservation of Mass?

Back

Yes, it follows the Law because there are 6 H atoms and 2 N atoms on both sides.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

If 2 g of hydrogen reacts with 32 g of oxygen, what is the mass of the product formed?

Back

The mass of the product formed is 34 g, following the Law of Conservation of Mass.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the total mass of reactants in the reaction 88 g of strontium and 160 g of bromine?

Back

The total mass of reactants is 248 g (88 g + 160 g).

Tags

NGSS.MS-PS1-5

Front

In the equation Na₂O + 2 CO₂ → 2 Na₂CO₃, does it follow the Law of Conservation of Mass?

Back

No, it does not follow the Law because the number of Na and O atoms is not balanced.

Tags

NGSS.MS-PS1-5

Front

How many atoms are in the equation 6 CO₂ + 6 H₂O → C₆H₁₂O₆ + 6 O₂?

Back

There are 36 atoms total in the equation.

Tags

NGSS.MS-PS1-1

Front

What is a reactant in a chemical reaction?

Back

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

Tags

NGSS.MS-PS1-2

Front

What is a product in a chemical reaction?

Back

A product is a substance that is formed as a result of a chemical reaction.

Front

What does it mean for a chemical equation to be balanced?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation.

Tags

NGSS.MS-PS1-5