I found it okay! I think it was
Increase temperature -> Decreased yield
Increase pressure -> Increased yield
I think that there was another question here, but I can't remember it... xD
Then there was one asking why heating would increase the rate of reaction, which I got a little confused about since it would also decrease it, because of equilibrium stuff. But I just wrote about collision theory etc.
For the one about the backward reaction I put that it would increase the rate of reaction.

Reply 766

juniorx

2

Original post by ActaNonVerba

780million and around 40000dm-3, you?

yep but i wrote mine as 78x10^7 (don't think it matters though)

Reply 767

lizz-ie

18

Original post by Ali_Ludley

For both the name the molecules I got:

3,7-dimethyloct-3-ene

1,1,1-triflouroethane

Not sure about the first one but I'm pretty sure on the second one.

I put 3,7-dimethylocta-3-ene, do you think I'll get the mark since I put octa instead of oct?

Reply 768

Bow Tie

14

http://en.wikipedia.org/wiki/Nitronium_ion

The NO2+ molecule is here ^^

NO2- is a nitrite ion

(edited 10 years ago)

Reply 769

ActaNonVerba

for the reaction with bromine.. We're we supposed to break both C=C bonds?? or we're we to leave the one in the cyclic chain?

Reply 770

Kathiye

13

I think that that could work (maybe? I assume that you counted from the other side). I don't know whether you're meant to start with the lowest double bond side or the lowest methyl group side, if you know what I mean. xD Hopefully they'll accept both.

Reply 771

juniorx

2

why is it dimethyl. i thought there was a branch on the second carbon with 2 carbons surely making it an ethyl??? And i got a hept 2 diene

Reply 772

Kathiye

13

Oh! That was probably it. I just got my 8s and 7s mixed up in my memory. xD

Reply 773

imstuckk

Original post by Kathiye

I found it okay! I think it was
Increase temperature -> Decreased yield
Increase pressure -> Increased yield
I think that there was another question here, but I can't remember it... xD
Then there was one asking why heating would increase the rate of reaction, which I got a little confused about since it would also decrease it, because of equilibrium stuff. But I just wrote about collision theory etc.
For the one about the backward reaction I put that it would increase the rate of reaction.

i got the same for the first 2, and for the increasing temperature, i wrote stuff like more molecules will have energy exceed the activation energy, so more successive collisions and rate increase. not sure about the last one

Reply 774

juniorx

2

Original post by ActaNonVerba

for the reaction with bromine.. We're we supposed to break both C=C bonds?? or we're we to leave the one in the cyclic chain?

well it said excess so i broke both and drew out the full structural (it didn't say you had to but i find it easier that way)

Reply 775

Kathiye

13

Original post by juniorx

why is it dimethyl. i thought there was a branch on the second carbon with 2 carbons surely making it an ethyl??? And i got a hept 2 diene

You had to look for the longest chain - there should have been an 8 carbon chain with two methyl groups on it. I think that you probably had one of the methyl groups as the end of the chain instead.