Recent content by heykyou

Thanks so much, CompuChip. :) I worked on that equation again. BTW, sorry, I made a typo--there is supposed to be a negative sign before dx/x, so the integration -ln|x| is correct. My mistake was in the integration by partial fraction. My resulting integral was separated by a negative sign when...

Thanks! Yeah, I knew there was some integration going on, but I didn't know how to integrate the x's and y's since they were together. I get it now. The exact DE's were absorbed into the du and dv. Stupid. :( Thanks so much for taking the time to explain it step by step. :) I want to ask...

I need some explanation regarding a solution found in our textbook. The example starts with this DE: (1) y(x3 - y)dx - x(x3 + y)dy = 0. By regrouping, exact DEs will be found and the equation can be rewritten to: (2) x3 d(\frac{x}{y}) - \frac{d(xy)}{y} = 0. The integrating factor is found...

Thanks so much for the help! But I have another question... What about BH4-? My answer is: http://img120.imageshack.us/img120/6356/bh4copyzb0.gif I'm not sure which of the two is more electronegative, but putting the negative sign on B seems more correct, since B has 3 valence electrons (and...

My answer was really funny -_-;; Kinda stupid to not figure out what I was supposed to do... But... Wow, everything falls into place! I can't believe that's so hard...and that's just one problem. Well, I'll try solving the other LS on my own, and ask you again when something comes up. Thanks...

If the charge is moved, do I have to move the one electron from Cl too? Sorry for asking this question, but I'm not sure about it ^^; Can an atom have an odd number of electrons--one isn't paired? http://img508.imageshack.us/img508/5537/clo33lk8.gif And sorry again, but can you explain about...

Thanks for replying! Whoops...I corrected the typo ^^; Another try at the structure: (I know this isn't correct yet...) http://img463.imageshack.us/img463/8745/clo32zd9.gif There should be 26 electrons, but in my structure there are only 25...and I don't know where to add the other one...to...

I don't think the problems I'm going to post are very difficult, but I'm totally clueless regarding chemistry, so they're pretty difficult for me ^^;; I also have a lot of questions to ask, so I hope you don't mind my sticking them all into one topic. I'm looking forward to your help. You don't...