CHEMICAL REACTIONS OF THE ELEMENTS ASSIGNMENT

Which equation indicates a synthesis reaction?

• 2HgO (solid) -> 2Hg (liquid) + O₂ (gas)
• CH₄ (gas) + 2O₂ (gas) -> CO₂ (gas) + 2H₂O (liquid)
• Zn + Cu²⁺ -> Zn²⁺ + Cu
• 4H₂ (gas) + 2O₂ (gas) -> 4H₂O

For a process to be defined as a chemical reaction, _____ must be produced.

• a new substance
• the same substance
• light
• more mass

An acid can be defined as a hydrogen ion acceptor.

• false
• true

Carbon and oxygen can form CO and CO₂ in the following ways: 1.33g of O combines with 1g of C (a ratio of 1.33:1) to form CO and 2.66g of O combines with 1g of C (a ratio of 2.66:1) to form CO₂. What is this an example of?

• Dalton’s Law
• Law of Mass Conservation
• Law of Definite Proportions
• Law of Multiple Proportions

In water, the mass of oxygen is 8 times that of hydrogen, no matter how the water was created. This is known as the Law of _____.

• Mass Conservation
• Definite Proportions
• Multiple Proportions
• Proust

Antoine Lavoisier broke with the alchemists in declaring that _____ is neither created or destroyed in chemical reactions.

• proportions
• synthesis
• mass
• energy

A chemical reaction is the process of converting _____ to _____.

• atoms; molecules
• reactants; products
• an acid; a base
• matter; energy

Which of the following are required for combustion to take place?

• Only oxygen
• Only energy
• Only fuel
• All of the above

The Daniell battery used a simple chemical reaction using zinc and copper sulfate: Zn (solid) + CuSO₄ (aqueous) -> ZnSO₄ (aqueous) + Cu (solid). What type of chemical reaction is this?

• Synthesis reaction
• Decomposition reaction
• Single replacement reaction
• Acid-base reaction

Oxidation and reduction reactions must occur together.

• true
• false