Easy if you had revised the stuff, especially the HCl and Carbon Dioxide question. The mass spectrometer question took me a lot longer than it should have, and I think I may have dropped a mark on it. How did you find it?
Relative abundance on the Y axis, m/z on the x-axis. The 37 peak should have been 1/3 the size of the 35 peak, with two smaller peaks at 17.5 and 18.5. I think it was a harder paper than recent ones, so I suspect the grade boundaries may be lower than last years.
Yes, they have to be shorter. Only the most energetic electrons have the ability to remove the second electron. 2BH I screwed up, it was very difficult in my opinion, and that's the same response I got from my class mates. Any rough guestimates on grade boundries?
Kinda, but, I wish to know the rough grade bounries... I mean based on the difficulty of the paper, how many marks do you think we could drop and still get an A?