Conservation of Mass/Matter

The Law of Conservation of Mass says that matter can neither be __________ or __________.

• created; destroyed

• recycled; renewed

• subtracted; added

• joined; separated

Tags

NGSS.MS-PS1-5

According to the Law of Conservation of Mass, what happens to the wood and oxygen when it is burned?

• The wood disappears.

• It stays the same chemically.

• The atoms in the wood and oxygen rearrange and form smoke and ash.

• Nothing.

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

In a reaction A + B ----> C,  reactant A has 5g and product  C has 9g. How many grams does reactant B should have? 

• 4g
• 5g
• 9g
• 14g

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

12g of Carbon react with 16g of Oxygen, how much carbon monoxide (CO) is formed? 

• 28 g
• 4g
• 30g
• 12g

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

When sodium and chlorine combine to form sodium chloride, sodium chloride is the:

• Originator

• Reactant

• Product

• Produce

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Anthony is performing an experiment. He adds 0.25 grams of baking soda to 5 grams of water and stirs. Anthony watches as the baking soda dissolves in the water. If Anthony weighs the water and baking soda solution, what will its mass be?

• 4.75 grams
• 5.0 grams
• 5.25 grams
• 7.5 grams

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

What will weigh more when a chemical change is complete?  The reactants before the chemical reaction, or the product after the reaction is complete?

• They both will weigh the same
• The product always weighs more than the reactant
• The reactant will weigh more than the product
• They both will loose mass after the reaction

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

This type of system allows matter to flow freely in and out...

• Closed System
• Open System

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

A boiling pot with a lid on it to keep in the energy is what type of system?

• Closed System
• Open System

Which chemical equation is balanced:

• CH₄ + O₂ → CO₂ + H₂O

• CH₄ + 2O₂ → 2CO₂ + H₂O

• CH₄ + 2O₂ → CO₂ + 2H₂O

• 2CH₄ + O₂ → CO₂ + 2H₂O

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2