Balancing and Types of Chemical Equations

In the equation, 2Mg + O₂ ---> 2MgO, which are the reactants?

• Mg and O₂

• MgO

• Mg and MgO

• O and MgO

Tags

NGSS.MS-PS1-2

Balance this equation,            Al₂O₃ ---> Al + O₂ 

• Cannot be balanced
• 2Al₂O₃ ---> 2Al + 3O₂ 
• 2Al₂O₃ ---> 4Al + 3O₂ 
• 3Al₂O₃ ---> 2Al + O₂ 

Tags

NGSS.HS-PS1-7

Balance this equation:  H₂ + N₂ → NH₃

•  H₂ + 4N₂ → NH₃
•  H₂ + 3N₂ → 2NH₃
•  3H₂ + N₂ → 2NH₃
•  2H₂ + 2N₂ → 2NH₃

Tags

NGSS.HS-PS1-7

Balance this reaction: ____ HCN + ____ CuSO₄ ---->____ H₂SO₄ + ____ Cu(CN)₂

• 2,1,1,2
• 2,1,1,1
• 1,2,2,1
• 1,2,1,1

Balance this reaction: ____ RbNO₃ + ____ BeF₂ ----> ____ Be(NO₃)₂ + ____ RbF

• 1,1,1,1
• 1,2,1,1
• 2,1,1,2
• 2,1,2,1

Tags

NGSS.HS-PS1-7

NGSS.HS-PS1-2

___C₃H₈ +___O₂ --> ___CO₂ + ___H₂O

• 1,5,3,4
• 2,10,6,8
• already balanced
• 1,5,5,4

Tags

NGSS.HS-PS1-7

__Al + __Fe₃N₂ -->__AlN + __Fe

• already balanced
• 4,2,4,6
• 2,1,2,3
• 1,2,1,3

Tags

NGSS.HS-PS1-7

__H₂O₂ --> __H₂O + __O₂

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

Tags

NGSS.HS-PS1-7

Which of the following is a acid-base reaction (hint: it is double replacement?

• 2Na + Cl₂ → 2NaCl

• CH₄ + 2O₂ → CO₂ + 2H₂O

• HCl + KOH → KCl + H₂O

• CaCO₃ → CO₂ + CaO

Classify this reaction

2Ca(s) + O₂(g) --> 2CaO(s) (hint: the charge of 2 elements change)

• Precipiation

• Acid-Base

• Redox

• Single Replacement