英语化学求分子式题!The compound adrenaline contains 56.79% C,6.56% H,

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英语化学求分子式题!
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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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

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