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

Which type of reaction takes place in the presence of oxygen and produces carbon dioxide and water?

• double replacement 
• decomposition 
• combustion 
• single replacement

Tags

NGSS.MS-PS1-2

What is the probable product of a double-replacement reaction?

• A new compound and a replaced metal
• A new compound and a replaced nonmetal
• 2 different compounds 1 aqueous and 1 that is a solid, liquid or gas
• A single compound

What type of chemical reaction takes place when fluorine reacts with sodium bromide?

• single replacement 
• double replacement 
• combustion
• synthesis 

Tags

NGSS.HS-PS1-2

A compound is reacted and forms two new substances. What type of reaction is this? 

• combustion 
• synthesis 
• decomposition 
• single replacement 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

Potassium iodide is a catalyst in a chemical reaction where would this be placed when writing the chemical reaction? 

• product side
• reactant side
• above the arrow
• left out 

A metal is reacted with an acid to produce a salt and a hydrogen gas. What type of reaction has occurred? 

• neutralization 
• double replacement 
• single replacement 
• synthesis 

Tags

NGSS.HS-PS1-2

What does the Law of Conservation of Mass state?

• Matter cannot be gained or lost in a chemical reaction.
• Matter can only be lost in a chemical reaction.
• Matter can only be gained in a chemical reaction.
• Matter can be gained and lost in a chemical reaction. 

Tags

NGSS.MS-PS1-5