Chemical Reactions Review

Which of the following reactions is balanced?

• 2CH₄ + O₂ -> CO₂ + H₂O
• CH₄ + 2O₂ -> CO₂ + H₂O
• CH₄ + 2O₂ -> CO₂ + 2H₂O
• None of the chemical equations are balanced.

Tags

NGSS.HS-PS1-7

Balance this equation... HgO --> Hg + O₂

• It is balanced 
• 2HgO --> Hg + O₂
• 2HgO --> 2Hg + O₂
• I don't know...Oh well!

Balance this equation.

__CF₄ + __Br₂ -- __CBr₄ + __F₂

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

Translate the following word equation:  Liquid nitrogen reacts with oxygen gas 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)

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

• 1,1,1
• 1,2,2
• 2,3,4
• 2,2,2

What type of reaction is the following:
CH₄ + O₂ → CO₂ + 2H₂O

• double replacement
• single replacement 
• combustion
• synthesis

Predict the products of the following equation: Mg + AgCl →

• MgCl + Ag

• MgAg + Cl₂
• no reaction will occur

• MgCl₂ + Ag

Translate the following word equation: 

aluminum reacts with fluorine gas to form aluminum fluoride

• Al + F → AlF

• Al + F₂→ AlF

• Al + F₂ → AlF₂

• Al + F₂ → AlF₃

2 C₅H₅ + Fe --> Fe(C₅H₅)₂ 

• single displacement
• double displacement
• decomposition
• synthesis

2 RbNO₃ + BeF₂ --> Be(NO₃)₂ + 2 RbF

• single displacement
• double displacment
• decomposition
• synthesis