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CHEM AND BIO HELP AND TIPS HERE
7ooD:
quick question in june 2007 chemistry last line in the paper where it says number of double bonds and 7 c same paper iii in ms it says con oil i didnt find it in my book wat oil is it is there others?
Ivo:
--- Quote from: 7ooD on June 04, 2010, 08:58:53 pm ---quick question in june 2007 chemistry last line in the paper where it says number of double bonds and 7 c same paper iii in ms it says con oil i didnt find it in my book wat oil is it is there others?
--- End quote ---
d) 884g of fat reacts with 8.84*86.2=762g of iodine.
One mole of fat reacts with 762/254=3 moles of iodine molecules.
Number of double bonds in one molecule of fat is 3.
c) iii) Simply look at the table for the one with the lowest saturated fat, which is corn oil.
Understood, qui ou non?
7ooD:
i dnt get how u got the number of double bonds and can a strong acid displace a weaker acid from its salt solution or a stronger base displace weaker base from its salt solution By the way i dnt speak paris :p
Ivo:
--- Quote from: 7ooD on June 04, 2010, 11:33:57 pm ---i dnt get how u got the number of double bonds and can a strong acid displace a weaker acid from its salt solution or a stronger base displace weaker base from its salt solution By the way i dnt speak paris :p
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In the question it says: one mole of I2 reacts with one mole of "1 carbon-carbon double bond".
The answer you found was 3 moles of iodine molecules. So, 3 moles reacts with 3 moles of "1 carbon-carbon double bond", so that would make 3 double bonds.
For your second question, please give an example.
Raywin:
Hey guys, :) umm a doubt. In electrolysis, is the products formed at the cathode and anode influenced by whether its a concentrated or dilute solution? Like if it is a dilute solution, will the H+ ions will have more chance of going to the cathode rather than a less reactive metal say copper and likewise the other way round, a concentrated solution will have the metal going to the cathode rather than Hydrogen? Does this happen? Thanks ;D
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