Qualification > Sciences
CHEM AND BIO HELP AND TIPS HERE
Baladya:
http://www.freeexampapers.us/IGCSE/Chemistry/CIE/2008%20Nov/0620_w08_qp_03.pdf
yoyo :D Can anyone explain 4)b)ii) how is it possible that the mole ratio in mark scheme is 6:6 (1:1) when the percentage of carbon is 92.3 and Hydrogen is 7.7??
Thanks :D
Raywin:
Guys, heres a Q that has been bothering me. :/ Does pollution affect the no. of organisms or the no. of species within tht polluted area? ??? ??? ???
Thanks, ;D
Baladya:
--- Quote from: Raywin on June 07, 2010, 12:10:49 pm ---Guys, heres a Q that has been bothering me. :/ Does pollution affect the no. of organisms or the no. of species within tht polluted area? ??? ??? ???
Thanks, ;D
--- End quote ---
what do u exactly mean.... with in that polluted area is right... but what do u mean with 'no. of organism' (without anything)
Raywin:
--- Quote from: Balalalalala on June 07, 2010, 12:14:01 pm ---what do u exactly mean.... with in that polluted area is right... but what do u mean with 'no. of organism' (without anything)
--- End quote ---
Hmm, like in a polluted area, does the pollution affect the number of organisms like for eg: due to pollution the no. of organisms reduced from 1000 to like 400, umm get it? Organisms like the total ones not looking at species here but general. and the other condition is does species reduce, for eg, the no. of species reduced from 10 to like 5. :/
Vin:
--- Quote from: Raywin on June 07, 2010, 12:17:49 pm ---Hmm, like in a polluted area, does the pollution affect the number of organisms like for eg: due to pollution the no. of organisms reduced from 1000 to like 400, umm get it? Organisms like the total ones not looking at species here but general. and the other condition is does species reduce, for eg, the no. of species reduced from 10 to like 5. :/
--- End quote ---
Hmm... I think I've solved this one somewhere.. which year?
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