Quiz on the Law of Conservation of Mass

According to the Law of Conservation of Mass, the mass of reactants and products are __________.

• equal

• different

• unrelated

• variable

Tags

NGSS.MS-PS1-5

In the reaction H₂ + O₂ → H₂O, if 3.4g of H₂ reacts with 10g of O₂, what is the mass of H₂O produced?

• 13.4g

• 10g

• 3.4g

• 5g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In the reaction CH₄ + O₂ → CO₂ + H₂O, if the mass of CH₄ is 12.2g and O₂ is 14g, what is the total mass of the products?

• 26.2g

• 20.0g

• 12.2g

• 14g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In the reaction Li + O₂ → Li₂O, if the mass of Li is 5.7g and the mass of Li₂O is 24.6g, what is the mass of O₂?

• 18.9g

• 5.7g

• 24.6g

• 30.3g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How much water would form if 14.8 grams of hydrogen reacted with 34.8 grams of oxygen?

• 49.6g

• 20g

• 14.8g

• 34.8g

Tags

NGSS.MS-PS1-5

Draw an open system.

Tags

NGSS.MS-ESS2-1

NGSS.MS-LS2-3

Water freezing into ice is an example of a...

• Physical Change
• Chemical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Physical or Chemical Change?  Iron rusts

• Physical Change
• Chemical Change

Tags

NGSS.MS-PS1-2

Physical or Chemical Change?  Making a paper airplane.

• Physical Change
• Chemical Change

Tags

NGSS.MS-PS1-2

What evidence in this picture indicates that a chemical change occurred?

• temperature change

• change in odor

• formation of gas bubbles

Tags

NGSS.MS-PS1-2