Hi, thanks for the feedback. I'm really glad the videos are useful! For that question I was using those % to illustrate how abundance of atom isotopes affects abundance of an X2 molecule. I knew that 3/4 of all chlorine atoms is 35 and 1/4 is 37. Sometimes they tell you this in the question (or tell you its 75% or 0.75). For exam questions, Sometimes you need to memorise those numbers, occasionally they tell you. I suggest that that is the most common isotopes focus, so I think you should remember it
@@chemistrytutor Ohh right, so it’s just something you need to remember and know for the exams. I was just slightly confused as I thought you had done some calculation to get 3/4 of 35 chlorine. Thank you so much for your help! It makes much more sense now! Also if you haven’t already I would really appreciate videos on the electrode potentials and cells topic and transition metals as I struggle with those topics the most.
@mar-bv7nw electron gun and electron impact are different names for the same thing. Depending on the machine, a sample is often injected into a separate ionisation chamber before it drifts through the vacuum into the electron gun chamber
@@chemistrytutor just another question, for mass spec calculations, when avogadro constant is involved, how would you know if you should divide or times the value by the constant. In different question sometimes you have to divide sometimes you have to times but i dont get why?
Hi, yes, this video will be suitable for any exam board. I teach AQA so I always make sure it covers everything needed for AQA. All exam boards are at least 95% the same though. The main differences between them is not the content they include, but rather how they structure the course, what topics are on each exam and the question style
