Law of Conservation of Matter Review

a number in front of a chemical formula that indicates how many molecules or compounds of each reactant and product are involved in a reaction

• denominator

• coefficient

• numerator

• subscript

What is the Law of Conservation of mass?

• Mass is created in a chemical reaction
• Mass is created in a physical change
• New chemicals formed from a chemical reaction have a larger overall mass than the original reactants
• Mass is never created or destroyed

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Matter can not be created nor destroyed: it can only be

• Destroyed a little bit

• Invisible

• Transformed, changed

• None of the above

Tags

NGSS.MS-PS1-5

Which of the models of a chemical reaction best represents the Law of Conservation of Mass?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-5

If reaction starts with 20g of reactants it should produce 

• a total of 40g of products

• a total of 80 g of products

• a total of 10g of products

• a total of 20g of products

Tags

NGSS.MS-PS1-5

Which of the models of a chemical reaction best represents the Law of Conservation of Mass?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-5

Which of the following is an open system? Select all that apply.

• 
• 
• 
• 

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

NGSS.MS-ESS3-4

NGSS.MS-LS2-3

Bubbles form when two or more substances are combined ...

• Chemical Change
• Physical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

• Originator

• Reactant

• Product

• Produce

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is this equation balanced or unbalanced? 
H₂ + O₂ --> H₂O

• balanced
• unbalanced

Tags

NGSS.MS-PS1-5