Worksheet 7.3 Balancing & Typing Reactions 05212024

What is the correctly balanced version of the equation: NH₄ --> N₂ + H₂

• 2NH₄ --> N₂ + 2H₂
• 2NH₄ --> N₂ + 4H₂
• NH₄ --> N₂ + H₂
• 4NH₄ --> 2N₂ + 3H₂

What type of chemical reaction is: NH₄ --> N₂ + H₂

• decomposition
• synthesis
• single displacement
• double displacement

What are the product(s) in the reaction: NH₄ --> N₂ + H₂

• N₂ & H₂
• NH₄
• H₂
• N₂

The correctly balanced version of: Ca + C + O₂ --> CaCO₃

• Ca + C + O₂ --> CaCO₃
• Ca + 2C + 2O₂ --> 2CaCO₃
• 2Ca + 2C + O₂ --> 3CaCO₃
• 2Ca + 2C + 3O₂ --> 2CaCO₃

The reaction type of: Ca + C + O₂ --> CaCO₃

• decomposition
• synthesis
• combustion
• single replacement

What is the correctly balanced version of: W₂O₃ + K₃N --> WN + K₂O

• W₂O₃ + 2K₃N --> WN + 2K₂O
• 2W₂O₃ + K₃N --> 3WN + K₂O
• W₂O₃ + 2K₃N --> 2WN + 3K₂O
• W₂O₃ + K₃N --> 2WN + K₂O

What is the reaction type of: W₂O₃ + K₃N --> WN + K₂O

• synthesis
• combustion
• single replacement
• double replacement

What is W₂O₃ + K₃N referred to as in the following reaction: W₂O₃ + K₃N --> WN + K₂O

• yield
• product
• reactant
• coefficient

The cathode-ray tube shown in the diagram demonstrated that

• visible light is deflected by magnetism
• a cathode beam (and matter) consists of charged particles
• atoms have a central nucleus
• atoms are mostly empty space

Balance this equation:

​ (a)   Fe + ​ (b)   O₂ --> ​ (c)   Fe₂O₃

• 4
• 3
• 2
• 1
• 0