Caffeine Consists of Carbon, Hydrogen, Oxygen, and Nitrogen

question 68

Multiple Choice

Caffeine consists of carbon, hydrogen, oxygen, and nitrogen. When 0.1920 g of caffeine is burned in an excess of oxygen, 0.3482 g of carbon dioxide and 0.0891 g water are formed. Caffeine is 28.84% nitrogen by mass. Its molar mass is between 190 and 200 g/mol. What is the formula for caffeine?

• A) C₆H₄N₄O₄
• B) C₈H₁₀N₄O₂
• C) C₄H₅N₂O
• D) C₃H₂N₂O₂
• E) none of these

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Definitions:

Pragmatics

The field of linguistics that focuses on how language is used within social situations and how individuals generate and understand meanings via language.

Metalinguistics

The awareness and understanding of one's own use of language and its properties.

Learning Theory Approach

A perspective in psychology that emphasizes learning processes, including classical conditioning, operant conditioning, and social learning, in understanding behavior.

Linguistic-Relativity Theory

A hypothesis suggesting that the structure of a language influences its speakers' cognition and perception of the world.