Law of Conservation of Mass

A chemical reaction is balanced when

• both sides have the same elements

• Both sides have the same  number of atoms

• Same subscripts

• Same coefficients

Tags

NGSS.MS-PS1-5

Maria fills a bowl with 200 g of water. She puts the bowl of water in the freezer, and the water freezes. Which will most likely be the mass of the frozen water?

• 50 g

• 100 g

• 200 g

• 400 g

Law of conservation of mass states the amounts of atoms in the reactants and the products...

• Increase

• Decrease

• Stay the same

• No correct answer

Tags

NGSS.MS-PS1-5

In the equation shown, what are the product(s)?

• N₂ + H₂

• NH₃

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is this equation balanced?

• Yes

• No

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is this equation balanced?

• Yes

• No

Tags

NGSS.MS-PS1-5

Is this equation balanced?

• Yes

• No

Tags

NGSS.MS-PS1-5

To balance an equation you should:

• ONLY change subscripts.

• ONLY change coefficients.

• Change BOTH subscripts and coefficients.

Which of the following best describes the Law of Conservation of Mass?

• Mass is created during a chemical reaction

• Mass is destroyed during a chemical reaction

• Mass is neither created nor destroyed during a chemical reaction

• Mass is converted into energy during a chemical reaction

Tags

NGSS.MS-PS1-5

In a closed system, if 10 grams of hydrogen react with 80 grams of oxygen to form water, what will be the total mass of water produced?

• 70 grams

• 80 grams

• 90 grams

• 100 grams

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5