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Chemistry: Post your doubts here!
hi. so3 + 2naoh ->na2so4 + h2o mol of NaOH = 2.5 x 10^-3 mol = 2 x mol of SO2 mol of SO2 = 1.25 x 10-3 mol Mr of X oxide = mass / mol = 0.1 / 1.25x10^-3 = 80 g/mol SO3 is (3 x 16) + 32 = 80 g/mol i did this backwards, knowing the answer as you've told. u can do it forwards by writing down... -
Chemistry: Post your doubts here!
in diagram 1, the higher temperature must be Q due to more molecules with high energy/ energy greater than ea, and less molecules with low energy. in diagram 2, yes catalyst lowers the Ea, so only a small value of molecular speed is required for particles to make successful collisions. Less Ea... -
Chemistry: Post your doubts here!
in diagram 1, the higher temperature must be Q due to more molecules with high energy/ energy greater than ea, and less molecules with low energy. in diagram 2, yes catalyst lowers the Ea, so only a small value of molecular speed is required for particles to make successful collisions. Less Ea... -
Chemistry: Post your doubts here!
You can view as and a level chemistry notes here https://mathsmadeeasy.co.uk/a-level-chemistry-revision/ Physics https://mathsmadeeasy.co.uk/a-level-physics-revision/ -
Chemistry: Post your doubts here!
i have attached two files here: a question paper and its markscheme. Please do help me with number 6b as soon as possible. Why 19.10 (which I think is got directly from the titre of titration 5). Why not sum up all titre values then divide by 5, I had got 19.23? How am I calculating wrong, or... -
Chemistry: Post your doubts here!
chemistry past paper mayjune 2011 paper 22. (s11_22). number 1. 1ci. I still couldn't process why it is directly 0.04. I thought 0.04 reacted so why didn't it subtract 1-0.04 = 0.06 for ethanoic acid?