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The compound adrenaline contains 56.79% C,6.56% H,28.37% O,a

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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.)
The compound adrenaline contains 56.79% C,6.56% H,28.37% O,a
C:H:O:N=56.79/12：6.56：28.37/16：8.28/14
=8：11：3：1
这题有问题啊!没定量!
所以为C8H11NO39(最简式）
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