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  1. USMAN Sheikh

    Chemistry: Post your doubts here!

    Help needed as soon as possible plsssssss be quick in correcty reply !!! Do explain me the following questions pls 11 16 22 23 40 pls uickly JAZAKALLAH !!
  2. USMAN Sheikh

    Physics: Post your doubts here!

    whch paper ?
  3. USMAN Sheikh

    Chemistry: Post your doubts here!

    Quickly need help !!!! how to do molar calcu lation in 1st question of titration the value of titre is 43.75 !!! need help with full details !!
  4. USMAN Sheikh

    Chemistry: Post your doubts here!

    In ques 17 find out epirical formula using percentage it will be values of empirical will be 1:1.5:1.5:10:7 in above eq Ca is 2 so we can do it by ratio method if ca is 1---------- 1.5 of AL so if Cais 2 ---------X ie al=X=3 si will also be three similar rations C is your ans
  5. USMAN Sheikh

    Chemistry: Post your doubts here!

    in quesstion 12 ans should be B in it u have to use common sense as accross the group EN inc and Down the group it decreases !! so Be will be the answer asfrom Be to Al we are moving one step in fovour to inc EN and one step down in order to dec EN hence both will cancel each other !
  6. USMAN Sheikh

    Chemistry: Post your doubts here!

    In question no 7 use hess law !! the equation build by using hess law will be -940+X=2*(-110) it will be C +720!!
  7. USMAN Sheikh

    Chemistry: Post your doubts here!

    Quickly need help !!!! how to do molar calcu lation in 1st question of titration the value of titre is 43.75 !!! need help with full details !!
  8. USMAN Sheikh

    Physics: Post your doubts here!

    salam hurriely need help phy 9702_w10_qp_22 kindly answer my question no 4(b) and 9702_w10_qp_21 6(b) pls be quick need help before mocks!!!
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