Caffeine Has an Elemental Analysis of 49

question 123

Multiple Choice

Caffeine has an elemental analysis of 49.48% carbon, 5.190% hydrogen, 16.47% oxygen, and 28.85% nitrogen. It has a molar mass of 194.19 g/mol. What is the molecular formula of caffeine?

• A)C₄H₅N₂O
• B)C₈H₁₀N₄O₂
• C)C₁₀H₁₄N₂O₂
• D)C₆H₆NO₂
• E)C₅H₇NO

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Definitions:

Olfactory Receptor Neurons

Specialized nerve cells located in the nasal cavity that detect chemical substances in the air, leading to the sense of smell.

Olfactory Epithelium

A mucous membrane at the top of the nasal cavity; contains the olfactory receptor neurons that respond to airborne molecules called odorants.

Glomeruli

Sites in the brain’s olfactory bulb where signals from the smell receptors converge.

Odorant Sites

Locations on olfactory receptors where odorant molecules bind, initiating the process of smell perception.