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Help spectroscopy chemistry

Help! This is my worst topic as of yet…
I’ve done multiple qs I still ALWAYS get stuck on the structure…
For example this question I would’ve lost most of the marks since it’s a levelled Q. Just for not knowing how to form the structure.
Can you help… I don’t get why the peak at 2.7 ppm and 2.3 ppm cancel each other out because they both have c=o but on the structure in the mark scheme there is only one c=o shown. Can u plz explain this other wise I get that spectroscopy is a guessing game. Like the structure and stuff. But there were like 2, seven markers on this paper which I would’ve lost… plz help 😭IMG_2169.jpegIMG_2170.jpeg
(edited 1 year ago)

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