General Thoughts: Chemistry (1 Viewer)

[lance687876]

MEEE, did u say that they can or NOT eat it.

l calculated about 9700 mg/kg.
so they would have fucking been sent flying if they eat it.

 

[jeffwu95]

i got like 0.22, with sig figs was 0.2 so ok to eat ^_^

 

[lance687876]

I said he could. Was the Hg conc. about 0.17? (In ppm)

dude, 3 marks for that?
there had to be come tricky as hell calculations, given the space provided

 

[jeffwu95]

it wasnt 0.17 because that was in like mg/L whilst you had to find mg/kg

 

[LifeBoats]

dude, 3 marks for that?
there had to be come tricky as hell calculations, given the space provided

I spent about a page trying to solve otherwise. But mg/L is in ppm and mg/kg is also in ppm. I think it may have been a troll question...

 

[Peter-PF7]

Hg concentration was approx. 0.228...mg/kg, less than 0.5 therefore he could eat it

 

[jeffwu95]

Hg concentration was approx. 0.228...mg/L, less than 0.5 therefore he could eat it

^ das it

 

[crazy_paki123]

i said they can eat in, i got like 0.12 or 0.15 mg/kg (cant remember exact)

 

[lance687876]

I spent about a page trying to solve otherwise. But mg/kg is in ppm and mg/kg is also in ppm. I think it may have been a troll question...

l spent a page too. but l'll still get 0.
okay, seriously, read your post again. you said 'But mg/kg is in ppm and mg/kg is also in ppm'
LOL!

 

[LifeBoats]

Hg concentration was approx. 0.228...mg/kg, less than 0.5 therefore he could eat it

Gahh, I got that answer in one calculation. But it just wouldn't make sense...

EDIT: It is 0.23 mg/kg. I. Crossed. It. Out. Because. I'm. Stupid.

 

[LifeBoats]

l spent a page too. but l'll still get 0.
okay, seriously, read your post again. you said 'But mg/kg is in ppm and mg/kg is also in ppm'
LOL!

lmao, sorry. mg/L

 

[LoveHateSchool]

Thank god I am not the only person that spent 20 mins on that fish question!

I failed so hardcore hahahaha

 

[Killersoloes]

Hey, somehow I got 2450 for K, since the number of moles changed from 0 to 0.198 for Nitrogen, Hydrogen would have the same concentration since they are in equal amounts in the equation. Since that adds up to 0.396 there would have been 0.004 moles left of NO thus i got 0.198^2/0.004^2.

 

[LifeBoats]

Hey, somehow I got 2450 for K, since the number of moles changed from 0 to 0.198 for Nitrogen, Hydrogen would have the same concentration since they are in equal amounts in the equation. Since that adds up to 0.396 there would have been 0.004 moles left of NO thus i got 0.198^2/0.004^2.

Jonathan?

That was according to the Intu/ icebox method wasn't it? No one else seemed to get the same answer despite that method being valid...

 

[Killersoloes]

Yeah how'd you know it was me. And yeah I used that method.

 

[yayschool]

Oh god, please let me get over 60. I'm so bad at chem

 

[LifeBoats]

Yeah how'd you know it was me. And yeah I used that method.

lol, I know everything. Except I would not trust my calculations under exam conditions, at all. I haven't seen another person who got the same answer.

 

[Peter-PF7]

Yehh i got that answer too, as did the 4 other top students from my school... but no one else seemed to get it ..? :S

 

[lance687876]

Oh god, please like me get over 60. I'm so bad at chem

if you get 60, you'll be alligned to like 78 :L

 

[catherineinabox]

what did u guys say the digram with the balls (molecular model) thing was? Please tel me it was addition polymerisation