Respuesta :

Phobic111

Answer:

71.58%

Explanation:

Find the Mr of C₁₇H₁₉NO₃ :

(12 × 17) + 19 + 14 + (16 × 3) = 285

Mr of carbon in C₁₇H₁₉NO₃ :

12 × 17 = 204

Percent by mass of carbon = [tex]\frac{204}{285}[/tex] × 100 = 71.58%

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