Paper was similliar in difficulty to last year due to weird questions and weird answers for the calculations (which I thought where originally wrong but glad I never changed them because by the looks of it they were right) so A will probably be around 56/57/58
I think that was an excellent paper, the only questions I hadn't seen before was the comparison of spectra using a higher energy electron beam (I just said the peak at 27.9 would still be the most abundant and that peaks would be seen at ~14-15 due to the formation of 2+ ions)
For the last question I chose first method because H3PO4 was the only product
What did you get for the formula for the Alkene? What about the type of cracking? The ionisation energy difference one was due to paired she'll and repulsion also wasn't it