Recent content by helloeveryone

propane is C3H8! Damn! 2 hours hitting my head with this prob for nothin until now, i should have learned in heart those shameful, ridisculous organic names. thanks bohrok. i figured out balanced equation for #2 is 4(OH)^- + 2Cr^(3+) + 3O2^(2-) = 2CrO4^(2-) + 2H2O. but 4 + 2 + 3 + 2 + 2 =...

Homework Statement Really appreciate helps from anyone, these two probs hurt my head 1. Complete combustion of a 4.10g sample containing only propane (C3H5) and pentane (C5H12), yielded 12.42g CO2 and 6.35g H2O. What is the mass % propane in this sample? a.4.50% b.38.0% c. 50.0%...

oh, nvm, i got it, that was the equation 41-6 in the textbook for n slits. If i am not mistake, the rest thing i have to do is use equation I(t)/Io = (E(t)/Eo)^2 to find out I(t) man, your'e genius, lifesaver, i love u man

thanx you so much for helpin me out. if you help me, you mind to help me a bit more: could you tell me how you obtain the formula above (you don't have to write everything in detail, just give me the source that you get the formula, or just give any formula that involve that formula above (is it...

Homework Statement somebody help me, i have a homework question: obtaining the formula of calculating the intensity of n slits interfenrece. Homework Equations the only source is the formula to calculate the intensity of double split interference: I/Io = (E/Eo)^2, and I = 4Io(cos(pie...