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  1. S

    Chemistry Doubts: IGCSE Paper 3

    no. of moles of O2= 0.16/24 =0.0067 moles''' 1 mole O2 gives 2 moles Pn(NO3)2 .....therefore 0.067 moles O2 will give 2 * o.o067 = 0.0133 moles mass of lead nitrate = 0.0133 * 331 =4.4g %of lead nitrate in the sample= (4.4/5)*100= 88.7%(y)
  2. S

    Chemistry Doubts: IGCSE Paper 3

    I just want to check if this is right: PROTEIN -NH-[]-CH-C=O-NH-[]-CH-C=O- NYLON -C=O-[]-C=O-NH-[]-NH-C=O-[]-C=O- PLS HELP :(
  3. S

    Biology paper 62

    3 pairs of legs and ipair of antena and wings present
  4. S

    Biology paper 62

    it wasnt asked i guess
  5. S

    Biology paper 62

    i did the same
  6. S

    Biology paper 62

    Yes
  7. S

    Biology paper 62

    both of them Rducing sugar and starch test>> u had to mention safety precautions also>>>
  8. S

    Biology paper 62

    what was the answer for the question which asked about cutting the apple and breaking it..which one would have greater surface area ...and in whuch browning occured first...i think it was Q1)c and Q1)d
  9. S

    Official IGCSE Physics guide

    Can anyone ple post the proper physics guide and not the notes!!! thanx
  10. S

    Physics Guide

    thank you!!
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