Odpowiedź :

mC5H11COOH=6*12 u+12*1 u+2*16 u=116 u

72 u---x%

116 u---100%

x=62,07%C

12 u---x%

116 u---100%

x=10,34%H

100%-(62,07%+10,34%)=%O

%O=27,59%

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