Chemical Reactions

Which is the name of the kind of solid substance formed in this figure?  

• aqueous 
• precipitate
• acid
• synthesis 

Tags

NGSS.MS-PS1-2

An element plus additional element reacts to form one product is an example of which type of chemical reaction? 

• combustion
• decomposition 
• synthesis 
• single replacement

Describes the number of molecules in a compound and is used to balance a chemical reaction. 

• coefficient 
• subscript
• superscript
• SI unit

Tags

NGSS.MS-PS1-5

Provides evidence that a chemical reaction has occurred. 

• dissolving 
• melting
• formation of a gas
• bending

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A chemical reaction that shows the formation of a solid and identifies the spectator ions

• net ionic equation 
• double replacement 
• ionic equation 
• dissociation 

What are the correct coefficients when this equation is balanced?
KClO₃  --> KCl  +  O₂

• 2,2,2
• 2,2,3
• 1,2,3
• 3,3,3

Tags

NGSS.MS-PS1-5

Translate the following word equation: 
Liquid nitrogen and oxygen gas combine to form nitrogen monoxide gas. 

• N + O → NO
• N₂ + O₂ → N₂O₂
• N_2(l) + O_2(g) → NO_(g)
• N_(l) + O_2(g) → NO_(g)

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Aqueous means...

• dissolved in water/solution
• water
• liquid
• plasma

Balance the following equation:
____MgO + ____H₂O → ____Mg(OH)₂

• 1,1,1
• 1,2,2
• 2,3,4
• 2,2,2

Predict the products of the following reaction: Pb(NO₃)₂ + 2KI → 

• PbI₂ + K(NO₃)
• PbK + I(NO₃)
• no reaction
• PbK(NO₃) + I₂ 

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2