compare the nmr spectra of furfural and furoin. a) (1 point) at what chemical shift does the aldehyde h appear (in the 1h nmr of furfural)? do you see disappearance of this peak in the 1h nmr of furoin? b) (1 point) the peaks corresponding to the hs on the furan ring appear at chemical shifts (~7-8 ppm) that are typical for benzene hs. is this expected? why/why not? c) (1 point) what resonances do you see in the 1h nmr of furoin that are not in the 1h nmr of furaldehyde? what (i.e. which hs) can these peaks be attributed to?