Chemical Rxns Review

What coefficients are needed to correctly balance the equation?
_Bi   +   _O₂   >   _Bi₂O₃

• 3,2,3
• 2,3,2
• 4,3,2
• none of these

Tags

NGSS.MS-PS1-5

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 is of the following is the best way to describe the yellow substance formed in this figure?  

• aqueous (s)

• precipitate (s)

• precipitate (aq)

• solution (aq) 

Predict the following reaction 
NaCl   +   Ca(NO₃)₂ --> 

• no reaction because both products would be soluble 

• solid calcium chloride and aqueous sodium nitrate are produced  

• solid sodium nitrate and aqueous calcium chloride are produced 

• solid sodium nitrate and solid calcium chloride are produced 

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

• single replacement 
• double replacement 
• combustion
• synthesis 

Which of the following options correctly balances the equation below?
__HNO₂ + __O₂ --> __HNO₃

• 4, 1, 4
• 1, 2, 1
• 2, 2, 1

• 2, 1, 2

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

• combustion 
• synthesis 
• decomposition 
• single replacement 

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Predict the products of this synthesis reaction: Na + Cl₂ →

• NaCl

• Na₂Cl₂

• Na₂Cl

• NaCl₂

Fill in the blank. (Copper has a charge of 2+)

Cu+ AgNO₃ → Ag + _____

• Cu(NO₃)₂

• CuNO₃

• CuAg

• Cu

Predict the products for the this Single Replacement reaction:

K + HCl →

• KCl + H₂

• KHCl

• KH + Cl₂

• H + KCl