Rxn and Sol'n Rev U7/U8

Identify the type of reaction:  
Ca + O → CaO

• Decomposition
• Synthesis
• Double Replacement
• Combustion

Identify this type of reaction,
Cl₂ + 2KI → I₂ + 2KCl

• Synthesis
• Single Replacement
• Double Replacement
• Decomposition

What is the "2" called in front of KCl and KI
Cl₂ + 2KI → I₂ + 2KCl

• superscript
• subscript
• coefficient
• symbol

Identify the reactants in the equation:
Cl₂ + 2KI → I₂ + 2KCl

• chlorine and iodine
• chlorine and potassium iodide
• iodine and potassium chloride
• potassium iodide and potassium chloride

Which of the following is correct regarding the equation:
Cl₂ (g) + 2KI (aq) → I₂ (s) + 2KCl (aq)

• chlorine and iodine are solids
• chlorine and iodine are gases
• all compounds are liquid
• potassium iodide and potassium chloride are aqueous

Which chemical reaction forms Carbon Dioxide and Water?

• Double Replacement
• Single Replacement
• Combustion
• Decomposition

Which reaction type is the following:
AgF + CaCl₂ → AgCl + CaF₂

• Decomposition
• Single Replacement
• Synthesis
• Double Replacement

Which reaction type is the following: 
2 NO₂ → 2 O₂ + N₂

• Synthesis
• Decomposition
• Single displacement
• Double displacement

What will weigh more when a chemical change is complete?  The reactants before the chemical reaction, or the product after the reaction is complete?

• They both will weigh the same
• The product always weighs more than the reactant
• The reactant will weigh more than the product
• They both will loose mass after the reaction

N₂ + 3H₂ --> 2NH₃
How many moles of N₂ is needed to react with 6 moles of H₂?

• 6.7
• 2.0
• 3.0
• 15.0

Tags

NGSS.HS-PS1-7