A) CH3-(CH2)11-CH2-CH-CH-CH2-Cl
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CH3 O NH2
B) Aflam masa moleculara a compusului. M=317,5. Si judecam asa:
Daca in 317,5 g avem 16 g O (un singur atom de O), in 95,25...
317,5 g compus ........................ 16 g O
95,25 g compus ...................... x g O
x= 95,25 x 16 / 317,5 = 4,8 g O