Kubus Sederhana
r = jari-jari atom
a = 2 r
Volume kubus = a3
= (2 r )3
= 8 r3
Volume atom = 4/3 . 3,14 . r3
= 4,19 r3
Volume rongga = 8 r3 – 4,19 r3
= 3,81 r3
% rongga = (3,81 r3 : 8 r3) x 100%
= 47,66 %
Kubus Berpusat Badan
(4 r)2 = 3 a2
a3 = 12,31 r3
Volume rongga = volume kubus - volume atom
= a3 - 2 . (4/3 . 3,14 . r3)
= 12,31 r3 - 8,37 r3
= 3,94 r3
% rongga = (3,94 r3 : 12,31 r3) x 100%
= 32,01 %
Kubus Pusat Muka
(4 r)2 = 2 a2
Volume rongga = volume kubus - volume atom
= a3 - 4 (4/3 . 3,14 . r3)
= 22,63 r3 - 16,75 r3
= 5,88 r3
% rongga = (5,88 r3 : 22,63 r3) x 100%
= 25,97 %
Tidak ada komentar:
Posting Komentar