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  1. Y

    chemistry p12 discussion !!

    me too :Yahoo!: :Yahoo!:
  2. Y

    chemistry p12 discussion !!

    that's my answer but i still don't get the reason ba is oxidising agent so the ox state of ba should not be 2+
  3. Y

    chemistry p12 discussion !!

    anyone remember any quest post here ...
  4. Y

    chemistry p12 discussion!!

    what is the product of mg + ba(no3)2 ------ is it mgo and mg(no3)2 * mg is reducing agent * ba is the oxidising
  5. Y

    CHEMISTRY P12

    what's the ans for mcq h2 + cl2 = 2hcl -96kj/mol h2 + I2 = 2hI +26kj/mol what can be implied from that? is it about the bond energy or the activation energy? I answer : hcl has lower activation energy
  6. Y

    Biology p22..How was it??

    for me the most difficult part is quest numb 5, about the smoking and disease.. how do you think?
  7. Y

    Biology p22..How was it??

    agree ! it's not difficult but weird esp number 5
  8. Y

    Biology p22..How was it??

    do you guys find the paper easy?
  9. Y

    how was phy P22??

    anybody know how to prove kinetic energy equation ? thanks
  10. Y

    how was phy P22??

    they said it's from maximum-minimum-maximum. So 6.7cm is one wavelength really confused
  11. Y

    GT for physics 22

    36 ameennnn
  12. Y

    chemistry p22

    yes, I did the same way... to find mass it's the most reasonable way but I still not sure however will it be ecf on that numb? " just in case it's wrong "
  13. Y

    how was phy P22??

    anyone remember the answer for the electric part and speed of wave? :( I got 168 ms-1 for the electric part is it I1+I3=I2 ?
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