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Mass spectrum of compound

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For the spectrum attached in document, I need help with calculating a possible molecular formula for this compound. This compound contains C, H, and Br. Can you also show your work, I want to check my work. Thanks.

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The spectrum given is of bromo-benzene. Two molecular ion peaks at m/z 156 & 158 of about the same height are suggestive of the presence of a bromine atom. More over the loss of Br radical from the ...

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The solution finds the molecular formula of the compound based on its mass spectrum.

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Identifying Compounds Using Infrared, NMR and Mass Spectroscopy

I need to identify the 2 unknowns. I was given these graphs. For each unknown, I was given IR, NMR, Mass spec and CNMR. I need the following for each graph:

IR- Peaks, range, and functional group
NMR- what each singlet and doublet represent
Mass Spec- total mass, what each line represents
CNMR - what does CNMR graph tells us?

And of course, what each unknown is.

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