英语化学求分子式题！！！

Question

The compound adrenaline contains 56.79% C, 6.56% H, 28.37% O, and 8.28% N by mass. What is the empirical formula for adrenaline? (Type your answer using the format CO2 for CO2.)

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Answer 1

n(C):n(H):n(O):n(N)=(m856.79%/12):(m*6.56%/1):(m*28.37%/16):(8.28%/14)=8:11:3:1

the empirical formula for adrenaline:
C8H11O3N

Answer 2

C9H13O3N