• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Search results

  1. Suchal Riaz

    Chemistry: Post your doubts here!

    thats they way i am doing. adding each question one by one. but instead on new post because the answer won't get notification when i add new answer to the same post.
  2. Suchal Riaz

    Chemistry: Post your doubts here!

    question 23: it means that the number of moles of ethene are 1/2 of total moles of products. it means that there are two moles of ethene, one mole of methane and one mole of propane. total number of carbon=2 from each ethene, one from methane and three from propane/ 4+1+3=8
  3. Suchal Riaz

    Chemistry: Post your doubts here!

    aldehyde will be oxidised to CO2H
  4. Suchal Riaz

    Chemistry: Post your doubts here!

    yes i made a mistake. it had to be x²
  5. Suchal Riaz

    Chemistry: Post your doubts here!

    calcium has 2+ charge so there must be two CO2H in case (1) there will be two ethanoic acids: 2CH3CO2- = C4H6O4(2-) in case two it is butandioc means there are di=two CO2H groups in one molecule: O2CCH2CH2CO2=C4H6O4(2-) in case three: there is again same butanedioc acid(it's isomer) so same...
  6. Suchal Riaz

    Chemistry: Post your doubts here!

    i am working on it Metanoia :) i had to erase some answer because you had already answered them. please tell me which one you are doing so i do other queries instead.
  7. Suchal Riaz

    Chemistry: Post your doubts here!

    37: dichromate will oxidise CHO to CO2H tollens and fehling reagent will oxidise CHO to CO2H aqueous bromine will react with C=C so first two are correct third is wrong because there is no -CO2H to react with Na2CO3
  8. Suchal Riaz

    Chemistry: Post your doubts here!

    question33: the questions says that methanoic acid IS stronger acid because it has a LOWER pH. it means that obviously it disassociates more. and if the rest two were true then it would have been weaker acid. tha
  9. Suchal Riaz

    Chemistry: Post your doubts here!

    if 1,1 dichloroethene polymerise the repeat unit will be -CF2-CH2- if two repeat units combine the other way around it can be -CF2-CH2-CH2-CF2- of -CH2-CF2-CF2-CH2- it can't be -CH2-CH2-CH2-CF2(pink color shows wrong group) only the correct answer follows this pattern: – CH2 – CH2 – CCl 2 – CCl...
  10. Suchal Riaz

    Chemistry: Post your doubts here!

    question number 1: NH4+: each Hydrogen has +1 oxidation number.total +ve oxidation number by H =4. overall charge is +1. 4-1= 3 N must have -3 oxidation number. NO3-:each oxygen:-2, all oxygen:-6 overall:-1, -1-(-6)=+5 N2O: oxygen:-2, overall=0; 0-2=+1 change of N of NH4= =+1--3=4 change of N...
  11. Suchal Riaz

    Chemistry: Post your doubts here!

    i solved it on the paper and then copied on the mspaint but i made a typo. sorry
  12. Suchal Riaz

    Chemistry: Post your doubts here!

    OH F**K i wrote 1 instead of x sorry.
  13. Suchal Riaz

    Chemistry: Post your doubts here!

    the moles of water are not = 1 the moles of water and ethylethanoate = x the moles of ethanol and ethanoic acid were 1 initially so the moles of them must be 1-x because x moles were used up to make water and ethylethanoate. read the diagram again. expecially the table.
  14. Suchal Riaz

    Chemistry: Post your doubts here!

    if rate in unaffected by concentration of OH it means that the slow step doesn't involve OH. it means it is Sn1 reaction. so the bromine is on a teriary carbon.so D is the answer.
  15. Suchal Riaz

    Chemistry: Post your doubts here!

    Sn is oxidised from2+ to 4+ so change in oxidation number=+2 Mn changes from +6 to +2 so change in oxidation number = -4 so there must be two moles of Sn for each mole of MnO4 to balance change in oxidation state.
  16. Suchal Riaz

    Chemistry: Post your doubts here!

    i meant moles of ethanol and ethanoic acid
  17. Suchal Riaz

    Chemistry: Post your doubts here!

  18. Suchal Riaz

    Chemistry: Post your doubts here!

    questions says that there are one mole of water and ethyl ethanoate. :P and when Kc has no units or when the volume of concentration cancel out, moles can be used in the equation. [a]/[c][d] = (n(a)n(b)/V)/(n(c)n(d)/V) volume will cancel out giving number of moles only.
  19. Suchal Riaz

    Chemistry: Post your doubts here!

    ZaqZainab this is how to solve :P
  20. Suchal Riaz

    Chemistry: Post your doubts here!

    i had to listen to eminem for 15 minutes to calm down.
Top