Caffeine (C₈H₁₀N₄O₂) Is a Stimulant Found in Coffee and Tea

question 37

Multiple Choice

Caffeine (C₈H₁₀N₄O₂) is a stimulant found in coffee and tea. What is the mass percent of caffeine, %(m/m) , for a solution of caffeine dissolved in chloroform (CHCl₃) that has a concentration of 0.0890 m ?
Molar Mass(C₈H₁₀N₄O₂) = 194.19 g/mol

• A) 1.05%
• B) 1.70%
• C) 8.9%
• D) 16.2%
• E) 68.6%

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