Balanced vs Unbalanced Equations Chemistry

What coefficient should be used to make the following equation balanced?
N₂+O₂--> _NO 

• 1
• 2
• 3
• 4

Tags

NGSS.HS-PS1-7

Balance this equation:
Al₂O₃ -> Al + O₂ 

• 2Al₂O₃ -> 2Al + 3O₂ 
• 2Al₂O₃ -> 4Al + 3O₂ 
• 3Al₂O₃ -> 2Al + O₂ 
• 2Al₂O₃ -> 3Al + 2O₂ 

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-7

What do the coefficients need to be in the following equation in order to be balanced?
_Al +_HCl → _H₂ +_AlCl₃

• 2, 6, 3, 2
• it is already balanced
• 4, 12, 3, 4
• 2, 1, 4, 5

Tags

NGSS.HS-PS1-7

What do the coefficients need to be in the following equation in order to be balanced?
_Mg + _Cl₂ → _MgCl₂

• 1, 2,1
• already balanced
• 2,1,1
• 1,1,2

Tags

NGSS.MS-PS1-5

Classify
HI → H₂ + I₂

• synthesis
• decomposition
• single replacement
• double replacement

Classify
Zn + H₂S → ZnS + H₂

• synthesis
• combustion
• single replacement
• double replacement

Classify
CH₄ + O₂ → CO₂ + H₂O 

• single replacement
• double replacement
• synthesis
• combustion

Classify
FeS + HCl → H₂S + FeCl₂

• synthesis
• combustion
• single replacement
• double replacement

Classify
Fe + O₂ → Fe₂O₃

• synthesis
• decomposition
• double replacement 
• single replacement

Balanced equation for ferrous nitrate reacting with stannic phosphate

• 6Fe(NO₃)₂ +  Sn₃(PO₄)₄ –––>  3Sn(NO₃)₄ +  2Fe₃(PO₄)₂ 
• Fe(NO₃)₂ +  Sn₃(PO₄)₄ ––––>   Sn(NO₃)₄ +  Fe₃(PO₄)₂ 
• 3Fe(NO₃)₂ +  Sn₃(PO₄)₄ ––––>   3Sn(NO₃)₄ +  Fe₃(PO₄)₂ 
• 2Fe(NO₃)₂ +  Sn₃(PO₄)₄ ––––>   Sn(NO₃)₄ +  2Fe₃(PO₄)₂ 

Tags

NGSS.HS-PS1-7