Hi, I am currently in the process of writing up my lab reports and wanted to know how to report mass spectroscopy and elemental analysis in the RSC style. In my report guidelines it suggests elemental analysis should be reported as follows: "Shown in the form: Found: C, 63.1; H, 5.4. C13H13NO4 requires C, 63.2; H, 5.3%." My elemental analysis resulted in: Carbon:53.1%, Hydrogen 3.9%, Nitrogen 7.7% and Oxygen 35.3% and so the empirical formula is C8H7NO4 What I'm having trouble with is substituting my values for the values in the example, i.e.: Found C, x; H, y. C8H7NO4 requires C, a; H, b%. Any help on filing in the blanks would be greatly appreciated! Also I wanted to know how to report mass spectroscopy in the RSC style, the example shows "m/z 183 (M+, 41%), 168 (38), 154 (9), 138 (31)." But I want to know how to add assignments to the different factions. For example my mass spectrum has a peak at 181 (100) and another at 166 (50). I know that the difference is 15 so this corresponds to CH3, but how do I report this in the RSC style? (Please don't just paste an excerpt from a journal; I would much prefer an explanation) Thanks in advanced!