Chemistry Chemical Reactions Review

Write a chemical equation for the following reaction: 
zinc metal and lead (II) nitrate solution react to form zinc (II) nitrate solution and solid lead

• Zn (g) + PbNO (s) --> ZnNO (s) + Pb (aq)
• Zn (s) + Pb2NO (aq) --> Zn₂NO (aq) + Pb (s)
• Zn (s) + PbNO₃ (aq) --> ZnNO₃ (aq) + Pb (s)
• Zn (s) + Pb(NO₃)₂ (aq) --> Zn(NO₃)₂ (aq) + Pb (s)

Tags

NGSS.HS-PS1-7

Write a chemical equation for the following reaction: 
potassium metal and chlorine gas combine to form solid potassium chloride

•  K₂(aq) + Cl₂(s) → KCl(s)
•  K(s) + Cl₂(s) → KCl(s)
•  K(g) + Cl(g) → KCl(s)
•  K(s) + Cl₂(g) → KCl(s)

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

• Mg and O
• MgO
• Mg and MgO
• O and MgO

Tags

NGSS.MS-PS1-2

Balance this equation, Ca + H₂O --> CaO + H₂

• Ca + 2H₂O --> CaO + 2H₂
• 2Ca + H₂O --> CaO + H₂
• Its balanced as it is
• Cannot be balanced

Tags

NGSS.MS-PS1-5

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

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

Tags

NGSS.MS-PS1-5

Name this reaction, Cl₂ + 2KI _-->  I₂ + 2KCl

• Synthesis
• Single Replacement
• Double Replacement
• Decomposition

_{Name this reaction,} CO₂ + H₂O --> H₂CO₃ 

• Decomposition
• Single Replacement
• Synthesis
• Combustion

What does the (aq) stand for in NaCl (aq)?

• solid
• aqueous 
• liquid
• gas

What does the (s) stand for in MgCO₃ (s)

• soluble
• salty
• insoluble
• gas

Tags

NGSS.MS-PS1-4

The correct formula for magnesium oxide is 

• Mg₂O
• MgO
• MgO₂
• Mg₂O₃

Tags

NGSS.MS-PS1-1