Acetylene (C₂H₂) Is a Small Organic Molecule Used in the Industrial

question 86

Multiple Choice

Acetylene (C₂H₂) is a small organic molecule used in the industrial preparation of many other molecules and also in welding. Acetylene is made from calcium carbide and water, resulting in acetylene and also calcium hydroxide. Which of the following choices is the correct balanced chemical equation for the preparation of acetylene?

• A) CaC₂ + H₂O → CaO + C₂H₂
• B) CaC₂ + H₂O → Ca(OH)₂ + C₂H₂
• C) CaC₂ + 2 H₂O → Ca(OH)₂ + C₂H₂
• D) CaC₂ + 2 H₂O → CaO + C₂H₂ + H₂O
• E) 2 CaC₂ + H₂O → Ca(OH)₂ + 2 C₂H₂

Comprehend the criteria and methods for filtering and finding records in a database.

Understand the purpose and process of aligning controls in reports for improved layout and readability.

Recognize the significance of property settings (Visible, Caption, etc.) for database objects and their effects on visibility and access.

Understand how to use tools like the Database Documenter for documentation and analysis of the database structure and properties.

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Definitions:

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Environmental Impact

The effect of human activity on the natural environment, which can range from pollution and destruction of ecosystems to conservation and restoration efforts.