Identification from spectra (18) Answer

IB Chemistry: Identification from spectra (18) Answer

ElementAmount / molSimplest ratioCarbon37.82/12.01 = 3.152Hydrogen6.36/ 1.01 = 6.304Oxygen55.82 / 35.45 = 1.571b) The M+ peak at m/z = 126 is evidence that the molar mass of compound R is 126 g mol-1 and hence its molecular formula is twice its empirical formula, i.e. C4H8Cl2. 126 g mol-1 is the molar mass when the isotopes of the two chlorine atoms are both 35Cl. The peak at m/z = 128, the (M+2)+ peak, is when one of...


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