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They're great, except for the fact you need to put everything in the 'bagging' area each time you scan an item.

thanks for rep bro !!!!!!! you do engineering at unsw?

smokers are jokers

epic haircut

Reacting with Na2S works well. As Sulfides will precipitate at different ph's. Other techniques include: colourimetry, chromatography, and mass spectroscopy.

That's a typical SBHS scrub for ya.

aint yo name magella not gell bra

www.facebook.com/fortify lulz i remember that thread

you gots a facebook username yet? fml this fml that fml everywhere @_@

im bloddy bored as well. i gotta rep ya back

thanks for the rep ~ ! how are ya magella?

hot

Yep ! Hence Co not CO :)

lol @ talent 99.95

wot?

No one cares if you're the smartest at your school.

sup apiwat

homg, i can't agree more. bloody overrated, all the tb's use it. just use hairspray lah~

I replied to post lah~

Write out the equations for each reaction (I did that on the above posts). Balance the equations and then that is your ratio for moles needed. Then you just change the ratios to fit the questions. ie: 30b] C4H18 + 25/2O2 -> 8CO2 + 9H2O Now the question asks for 10 moles of Octane. Our ratio...