Chemical Reactions & Equations

Chemical reactions

• create and destoy atoms

• only occurs outside living organisms

• occurs only in living organisms

• produce new substances

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Chemical equations

• give directions for naming compounds

• describe only biological changes

• describe chemical reactions

• show how to write formulas

Tags

NGSS.HS-PS1-7

In the chemical equation H₂O₂(ag) → H₂O(l) + O₂(g), the O₂ is a

• reactant

• yield

• product

• solid

Tags

NGSS.MS-PS1-2

Which side of a chemical equation is the product side?

• Left (before the yields sign)
• Right (after the yields sign)

Name the part in red:

H₂ + O₂ -> H₂O

• Coefficient
• Product
• Yield
• Subscript

Identify the Reactants in this equation.

• A

• B

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What state of matter is this substance?

• solid

• liquid

• gas

• aqueous

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

In what state is this substance?

• solid precipitate

• dissolved in water

• released as a gas

• liquid

How many atoms of nitrogen are present in this molecule?

• 1

• 2

• 3

• 4

Which compound is formed as a precipitate in this reaction?

• Pb(NO₃)₂

• KI

• PbI₂

• KNO₃