Applied Chem: Unit 6 Review

Si + S → Si₂S₄

• Synthesis

• Decomposition

• Single displacement

• Double displacement

Ca + AlCl₃ → CaCl₂ + Al

• Synthesis

• Decomposition

• Single diplacement

• Double displacement

NO₂ → N₂ + O₂

• Synthesis

• Decomposition

• Single displacement

• Combustion

Fe + H₂S → Fe₂S₃ + H₂

• Synthesis (combination)

• Decomposition

• Single replacement

• Combustion

Which reaction type is the following: C₅H₁₀O₄ + O₂ → CO₂ + H₂O

• Decomposition

• Single Replacement

• Combustion

• Double Replacement

Which of the following is the general formula for a decomposition reaction?

• A + B  → AB
• AB → A + B
• AB + C → AC + B
• AB + CD → AC + BD

When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced

• charge
• subscript
• random number
• coefficient

What coefficient should be used to make the following equation balanced?

N₂ + O₂ → ___NO

• 1

• 2

• 3

• 4

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

• the product is doubled
• the product is half the mass of the reactants
• the mass is the same
• the mass changes depending on the reaction

If an element is diatomic it should have a subscript of___

• 1, always

• 2, only when it is an element

• it shouldn't have a subscript, it should have a coefficent

• 2, when bonded in a compound