Chemistry

[Zot09]

I know this is a pretty random thing to do, but I really need some help on my chemistry webwork, so I thought of asking everyone on JW if they could help. Thanks ahead of time lol

The problem is:
Answer the following for a face centered unit cell
Answers should be numerical, r=6.0

Edge in terms of r, the lattice pt. radius
face diagonal in terms of r, the lattice pt. radius
body diagonal in terms of r, the lattice pt. radius

And here is the diagram:
http://img453.imageshack.us/img453/5716/image27oq.th.jpg (http://img453.imageshack.us/my.php?image=image27oq.jpg)

[gigdy]

Face center cubic is the devil

[gigdy]

body centered cubic is the devil

[gigdy]

chemistry is the devil

[gigdy]

spam

[bmwmpower]

my high school specialization is chemistry and biology, but i forgot almost everythink,

btw i have no idea,what re u asking,

[Zot09]

my high school specialization is chemistry and biology, but i forgot almost everythink,

btw i have no idea,what re u asking,

haha I'm pretty confused as well, that is all the problem said. But basically, I think i'm trying to find the edge length, face diagonal length, and body diagonal length...ugh haha

[gucom]

so its maths rather than chemistry?

[Pehtren]

What are thos bublles :lol:

No FuCkInG idea :( :mrgreen:

[bmwmpower]

my high school specialization is chemistry and biology, but i forgot almost everythink,

btw i have no idea,what re u asking,

haha I'm pretty confused as well, that is all the problem said. But basically, I think i'm trying to find the edge length, face diagonal length, and body diagonal length...ugh haha

its atom designed by u or is just a know substance ?
all i know, we used tables ,where i can find all informations about specific substance, molary weight, concetration and so on,

[sbcarguy]

Assuming the balls are touching on the face.

face diagonal: a^2 + a^2 = (4r)^2, solve for a
body diagonal: (4r)^2 + a^2 = b^2, solve for b, knowing 'a' from previous result.

Just a guess! If not, don't kill me! :wink: