Question

Barium has a density of 3.59g/cm3 and crystallizes with the body-centered cubic unit cell. I keep getting this problem incorrect, not sure what i am doing wrong.

Answer 1

http://www.chemteam.info/Liquids&Solids/WS-bcc-AP.html
Look at Problem 5
I hope this helps :)

Answer 2

ok so you know this formula,
d = (nA)/(Vc N), where

d= density given,
N=avagadro number
A= atomic mass of the atom
n= no. of atoms per cell....from there calculate value of Vc
and then substitute it in\[Vc = (4R / \sqrt(3) ) ^ 1/3 \]
And from there calculate R.......!! )

Answer 3

@aryandecoolest Hello. Thank you for your help. I followed your direction and i ended up with basically the same answer 2.2x10^-8 :|

Answer 4

wow!! awesome genius :) pleasure to help @elaornelas )

Answer 5

@aryandecoolest did you get the same ?! :)

Answer 6

but what I'm confused about is, how did i get marked incorrect? :/ what did i do wrong?

Answer 7

yeah i got 0.218nm its basically the same....when u convert from 2.18x10^-8 cm

Answer 8

It's correct answer...!!! who said it's incorrect?? O.o

Answer 9

ug I just entered it and it said it was incorrect :/ I'm using this program called mastering chemistry

Answer 10

ohhhh goodness -_-
it was 208 "pm"

Answer 11

oh it's asking in pm...u r entering it the answer with the unit cm so i think there's the problem....

Answer 12

LOL yeah!! that's what... you were right :) smile :D

Answer 13

haha darn. Took a while! I'm glad thats over and done aha. Thank you so much @aryandecoolest

Answer 14

yep!! glad to help!! no problem..anytime ) @elaornelas