Recent content by getfirefox

Hello. These might be easy but I've not done this in years. What are these expressions canceled down? Not homework, I just can't do them. [PLAIN]http://img692.imageshack.us/img692/4849/fractions.png Thanks very much guys.

Hi everyone. I don't have access to a visible spectrophotometer to do this so I'm looking for results on the internet. I just did the persulfate variation of the iodine clock and I need absorbance spectroscopy results for the blue/black complex that is formed with the iodine and starch at...

Yeah sorry if that was worded poorly. Doesn't it have something to do with electrophilic addition or something though? The iodine being attracted to a positive bond somewhere (maybe the sulphur?). I really don't know but I sort of need to have an idea. :(

Hey guys. Any chemistry experts around? I just did Persulfate variation of the iodine clock experiment. http://en.wikipedia.org/wiki/Iodine_clock_reaction According to collision theory explained on this page, molecules need to hit each other in certain positions to react. Which molecule...

Homework Statement Homework Equations None needed. The Attempt at a Solution Can anyone please explain to me what this question is asking me to do and how I might go about showing this? Thanks guys for your help.

Hello everybody, I have a small question I need help with. Homework Statement Draw a sketch graph of the following: "A car which is traveling at 15 ms-1. At t (time) = 0, the driver sees a pedestrian step out into the road. The driver takes 0.7 seconds to apply the brakes, and the...

EDIT: I got 3x10 to the power of -18 meters cubed. Can anyone confirm this for me?

OK, don't ask why I need to work this out, I just do :P OK. I have a box (not in real life) 5 KiloMeters long, 2x10 to the power of -6 nanometers high, 3x10 to the power of -4 mm wide. Could someone please find the volume of this box in meters cubed and explain to me how they got it...