Conservation of Matter

Law of conservation of mass means that the number of atoms of the products is more than the number of atoms in the reactants.

• True

• False

Tags

NGSS.MS-PS1-5

If reaction starts with 20g of reactants it should produce... 

• a total of 40g of product
• a total of 10g of product
• a total of 80 g of product
• a total of 20g of product

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is NOT part of the Law of Conservation of Matter?

• Matter cannot be created or destroyed

• Matter can be rearranged

• Fire converts matter to heat

• Matter can change phase; go from a solid to a liquid to a gas

Tags

NGSS.MS-PS1-5

In a chemical reaction, our reactants are the molecules and atoms that we start with.

• True

• False

• Squirrel!

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In a chemical reaction, our products are the molecules and atoms that we start with.

• True

• False

• Squirrel!

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

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

What is the volume of Object X?

• 10.0 cm³
• 15.0 cm³
• 20.0 cm³
• 25.0 cm³

If you put 200 grams of ice into a pitcher with 900 grams of water. Then get distracted and come back later to find that the ice has melted in the water. How many grams of water do you now have in the pitcher?

• 200 g

• 700 g

• 1,100 g

• 9,200 g

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-5